I'm very conflicted and need advice

Okay mamas don't judge me but i am very conflicted and don't know what to do or think anymore. I found out i was pregnant a few weeks ago and i told the guy who immediately wanted me to get an abortion ( what an asshole right?) anyway I told him that i would but then i went to get an ultrasound because idk for some reason i didn't believe i was really pregnant because my ex and I tried for an entire year and never conceived so i thought i couldn't get pregnant like legit thought something was wrong with me but ig thats beside the point. When i went for the ultrasound they found a sac and yolk no baby and told me to come back in two weeks. Well that was yesterday and the doc performed an abdominal scan and it wasn't very clear but i swear i saw a flicker on the screen. I couldn't help but feel happy even tho the circumstances aren't desirable. He keeps going back and forth between getting the abortion and not getting it but i don't think i want it honestly. I have an 8 year old daughter and I cant even imagine life without her. Idk i just dont know what to do anymore. I don't want to make someone be a Dad if they dont want to be but i also dont want to be a single parent for the second time. 😩