I don't know what to do

I'm almost 12 weeks pregnant and I'm only 21 years old. I feel so scared to have this baby. I have little to no support in my family and the baby's father & I can never stop arguing which is causing so much anxiety & stress. I hate that I brought a child in between our mess, If only I could go back three months ago, I would of left this toxic relationship & would of never been pregnant. I'm so tempted to have an abortion because i am still in college & can barely take care of myself, but at the same time, I love my baby. I'm just so scared, and I know it sounds selfish but I just dont know what to do.