Advice needed 😭😭

So let me start of by saying I’m pregnant , and single how you may ask ? Well I was with a guy for 1 year we planned a baby on April of this year and Miscarried June we were both very devastated cried for months. Now fast track to now we broke up October 7th and I found out I’m pregnant October 31st he believes it’s not his but deep down I know he knows it’s his he wants me to have an abortion and at first I was excited about this baby but now im afraid because this won’t make him come back I don’t know forsure if he’d even help

I’m 23 with a 9 year old and a 4 year old

I’m In medical school adding another baby without a father to the mix is complicated I still live with my mom and financially I don’t think I can do it.

I’m so lost my heart feels heavy :( I won’t forgive myself if I have an abortion but I’m also not happy keeping it

I have no idea what to do I cry about this every day 😭

His family doesn’t know he hates me and doesn’t want anything to do with me and what if I bring this baby into this world and the child suffers.