Im fxkn pisst

Ok today is my baby sister 12th birthday.The last child of the tribe. So today Like i felt lost when i got up cause my 2 dogs went with my SO cousins house cause we are going to his mom house to go church the next day. It felt like an off day cause im usually with them. Well anyways when my baby sister & her friends was playing limbo i went to do my laundery, then my sister thats below me put the broom down i was walking down stairs she lift it right back up i fell down straight on my knees first & i felt like numb. I fell pretty heavy like my whole weight. I told my SO what happen cause he kept calling me liar cause i didnt text him for like 5 mins after he texted me. It pisses me off cause something bad always happen to me when i dont text him back like a few mins he texts me. Anyways he came home got my baby sister a birthday cake. I appreciate that so much honestly SO MUCH. So anyways. All he wanted to do is play his games before his mom comes. But my baby sister came upstairs to tell me lets sing her happy birthday. Let me tell you something i cant do anything with my family. I mean when it comes to my baby sister I WOULD KILL SOMEONE FOR HER. Other then that FUCK MY FAMILY. Blood dont make you related loyalty does. I go by that cause im like a slave to them & they are pretty much horrible people. But my SO didnt want to sing. We went down stairs when i was walking down he kick back of my knee on my left side & laughed amd said oops sorry (when it comes to my family it pisses him off & does stuffs like that when im hurt). &*thats where the pain really is i cant walk good it hurts so fucking bad. I cannot cry cause if i do im a cheater. (He thinks stupid with me & my dumb little brother cause what happen to my older brother & my younger sister he raped her) anyways when we was waiting for my dad to come down stairs (he diabetic he cant rarely walk) my SO mom just pulled up & he told me lets go get our shit. I said but we gotta sing. I cant leave without singing to her. He said what cause you fat & ypu like icecreamcake. So i went upstairs to get our stuffs he pushed me & said get your shit & said whats your problem. I said wtf you think. Its my last baby sister all i wanna do is sing happy hirthday to her. Everytime when we ready to sing happy birthday he doesnt want to be part of it. He makes a big deal & says "I like play games i aint got time for this shit'" & when it comes to his shit talking, disrespectful sisters which who talks shit bout my unborn child who passed i gotta sing happy birthday to them. I tell him why i dont wanna sing happy birthday to them its cause they are so disrespectful to me. They make alot of comments about my size & my looks & my SO just laughs. I just feel irritated & not feeling good my knee to my toes hurts so bad & im super irritated cause i really wanted to sing happy birthday to my one & only baby baby sister😟. I feel so sad rn cause i didnt sing to her. Im crying & when i went to sit in the car he digged his elbowed on my left knee.