My Father Wants To Claim My Son

(North Carolina)So my bf (19m) and I (18F) had a baby in January 2024. After that I stayed with my bf and his mom while my baby was in the nicu for 2-3 months and up until June- July. Then my dad decided to take legal action to force me to come home. So from there I was forced to “live” at home- which really just means I had to be home by curfew to sleep and then I left again as soon as I woke up everyday. So that whole time he was not feeding me or buying any of mine or my babies essentials, my bf and his mom was. The only thing my dad did was force me to stay at home and my son was put under his Medicaid. Well I turned 18 in September and immediately stopped going “home”, my dad continued to receive food stamps for us which I had to report. My bf has been working and needs to claim OUR son on his tax returns but my father is saying that he plans to since my son “lived” with him for more than 6 months of the year “in the eyes of the law” and says that we won’t be able to bc of this and the fact that he is under his Medicaid (but I called after my birthday to have him put under just me) he even said we would have to pay back medical expenses- but it’s Medicaid- that I have too, and I’m pretty sure he’s never had to pay for it. In general. So it kinda seem like he is trying to manipulate us that he’s factual just to get his way (done it many times before)