need to rant 🙄🙄🙄

so im 20 and im pregnant with my first son.. my ex and i were living together and i had planned on being a SAHM because he works a lot of hours and would have been able to pay all of our bills by himself and i was just gonna focus on my son and school.. so about a month ago, i caught him cheating and he kicked me out.. the second i mentioned child support, he went off on me saying he hated me and i was gonna be a shitty mother and then proceeded to say how "he's not his son" 😒😒 so fast forward to now, i havent spoken to my son's father at all, and im living at my mom's working 35+ hours a week and going to school, and i save 150-200 each paycheck for expenses for my son and still survive on my own (other than my mom letting me live with her rent free, which i am very very thankful for) so anyway, i dont ask my mom for shit... my step sister is 20 and also lives at home with my mom and her dad.. we work at the same job and she works about 20 hours a week and half the time calls in for dumbass reasons.. she called into work last week because she had a uti lol.. so she gets money from her mom all the time and my mom and her dad literally pay her $300 car payment for her when she doesn't work enough to pay it on her own.. and now she comes home all the time telling me how her and her boyfriend never use protection and he doesn't pullout or anything, so im like 90% sure she's trying to get pregnant just because i am.. they've been together for less than 3 months 😒 it's super super annoying and i just needed to let it out 🤷🏻‍♀️