Am I overreacting? (Long post)

My daughter is 9 months old and loves running around in her little walker, so my mom bought her one for when we are at her house (an hour away).

(We don’t go there much because I really don’t have a great relationship with my family— when my daughter was first born my mom would text people and tell them that “I didn’t know how to take care of my baby, etc” all because she was mad that I wouldn’t let her come to my house and “help”— also because she doesn’t agree that me and my boyfriend weren’t married before we had our daughter, and bc I’m ‘young’ (I just turned 21 last month) and it’s all basically just went downhill from there. I really don’t want to be around my family and I haven’t wanted anyone’s help bc I don’t need the negativity that it would bring, and neither does my boyfriend and daughter. (I have an extremely toxic, manipulative family)

Anyway, we were at my moms house the other night and my daughter was walking around in her walker and she starts walking toward an outlet. So I get up before she can even get close enough and pull her away and say “no baby” in the middle of me doing this my mom screams at the top of her lungs “NOOO” at my daughter. And it really made me mad. My baby looked terrified, and almost started to cry. (We do not yell in our house so my daughter is not use to yelling or loud noises.) I was mad for a couple reasons tho, 1.) I was literally in the middle of getting my baby when my mom decided to yell at her. 2.) SHES NINE MONTHS OLD, yelling isn’t going to do anything but scare her, she didn’t even understand what was happening. 3.) She’s my child, NOT my mothers and she had no business yelling at her to begin with. So after this my mom asks me when my last doctors appointment was (I’m 30 weeks pregnant) and I told her I had to reschedule bc my daughter didn’t sleep good the night before my appointment because she’s teething, and I wasn’t gonna wake her up first thing in the morning to go with me when she had already barley slept. And she says “you should have brought her to me I bet I could’ve got her to sleep” MIND YOU— no one besides my child’s father has ever helped me with her in her entire life. I’ve never asked and I’ve never wanted help because I don’t need it🤷‍♀️ but I honestly feel like she’s belittling me as a mother and overstepping. Every time I confront her it’s “she’s my grandbaby” and honestly it doesn’t matter what she is to anyone, because she’s MY CHILD before she’s anything to anyone else. Also, when I have my 2nd baby in 9 weeks via repeat c section, I have the choice of leaving my child with my mother- and who knows what’ll happen with me or her dad not being there (they) my mother and grandmother— also believe in “swatting & spanking” little kids which I’m definitely not okay with and don’t agree with but I wouldn’t put it past either of them since they obviously think it’s okay to yell at my child right in front of me. Or leaving her with my boyfriends mom— who barley knows her or anything about her as he doesn’t have a good relationship with his mom either. I’m honestly so stressed out over this situation and the fact I’m going to have to leave my baby and I have no choice.