Boyfriends mom attacked me

So me and my boyfriend live at his moms house and we pay rent.I got pregnant so I need to save for my baby.She KNOWS my boyfriend has hurt me before by throwing a phone to my face and getting me a bruise and she even gave me ice for it.I was pregnant at the time and she KNOWS.So we both pay $200 rent so that makes $400 of our rent together for her house taxes or whatever .Anyways I can't really work so much being pregnant and all and my boyfriend knows that and she knows that.So I haven't being paying rent cause I work less so I have money for my food and saving for the baby cause we have no savings.She knows he could have gone to jail and not have a son to help.So there goes bye bye $200 IF that were have happened right.And that would have meant me moving out too so that would have been -$400 for her.BUT I that didn't get reported.So she still has a son to pay $200 right now and then me not being able to pay rent makes her only have $200 in rent until total and I'm here thinking if he would have gone to jail she would have $000 no money so you think she could be grateful but no.And She refuses to understand he situtaion.So she wants me out and her other son takes away my keys one day with force (she has one older son 27 and my boyfriend .She can only have grand babies trorugh my boyfriend since her other son is gay 😑So you would think she would have unconditional love for us but no.)My boyfriend works and goes to school and barely has money to pay my rent so she is short for like 3 months now.And I'm 5 months pregnant .And so no rent means me getting kicked out .( pretty sure not the First Lady out there has experienced that)And so I don't live there anymore and don't have the keys cause I can't pay rent for important reasons (baby and my food for health)And so these past three nights I have only spent the night and not actually live there.Today me and him are eating a snack and she is like what happened.She doesn't live here anymore I want her out.(Keep in mind that I still haven't gotten all my stuff cause a pregnant person can only do so much moving )and she is like I'm going to sit at this table till "she "is out of my house.(she has no husband)and so me im just not responding and chewing my food and my drink cause I need food now and I still will get out if I'm unwelcomed right and I'm chewing my food and she is like you think this is funny?I see you smiling and I'm like what ?'😳I'm only eating (Where does she get a smile from??)So I tell her "you're exaggerating "and continue with my food.I finish and I go to the room to get my bag and she is still in the kitchen and his time sitting on a chair closer to the door and she just says the same thing "why do you think this is funny quit smiling"and I can only do so much being pregnant buttons being pushed and me being defenseless and provked and talking to me ugly with respect like I can't let ANYONE talk to me like that even if it's my boyfriends crazy mother so I tell her some stuff and there is cussing and she starts cussing at my am I'm out the door and I'm in the car already when she gets out and start coming my way saying stuff.And I close the door and we are still arguing and she opens my car door saying I have no respect and I'm like how will I ever show respect to someone who has never gave respect o me.Like that's not going to happen"I am trying franctically to lock the door and window but the buttons are just wack on my boyfriends car.(I couldn't go in my own car cause of the nails stuck in the front two tires) And we keep arguing I manage to lock the door but the window is still cracked and she ends up attacking me by pulling my hair and pulling my head against the car window.She then lets go and my boyfriend is covering my face and when he stops I spit in her face cause hats the only thing I can do from inside the car and she gets upset.She starts threatening me I will have your car towed.And she will not move from I front of the car to keep us from leaving and that's what she wanted us out.So I'm like terrified and angry that she would to that KNOWING I am pregnant and she says I'm not and she clearly knows it and got us some used baby shoes(No way will I ever use bad ju-ju shoes on my baby)(I threw them away a couple days ago cause I had previously decided months ago she will not hold my baby or see my baby)So that happened on her property and I'm away from there now and I want my stuff and I don't have the keys from there and I don't want to see her face and my boyfriend doesn't want this to happen now and I do.be cause I could have a miscarriage.My boyfriend is like wait till tomorrow and I'm so stressed and I can't trust her with my stuff in her house and I certainly don't want my boyfriend to live there if she is choosing her son to pay her rent (when she can find someone if she really needs too because my boyfriend now has a responsibility to me and his baby for expenses not hers) And I feel like she is upset with that and I feel like she is doing harm on to me and being ugly towards me because that's what my boyfriends mother used to do to her .(She is a Pisces and holders grudges forever)I feel like she is childish for not being a grown woman and hurting. And terrifying a defenseless pregnant woman .Sure she didn't  make me bleed or give me a bruise but she hurt me and now I'm having pains on my belly and I'm shaking and scared for this baby and I don't know what to do .I want my stuff asap and I just wish to report her but how can I if there is barely any proof only that my boyfriend saw me and it was her property and I was leaving and I'm still my boyfriends girlfriend so he let me come there and sleep there.And when she said I was unwelcome daughter well then I left but she came after me arguing provoking me and I feel like she wants me to miscarry and she is doing this on purpose and it is workingful.How do I go on reporting this woman??Help