WIBTAH for getting an abortion without my ex’s permission?

I (25F) recently broke up with my boyfriend (46M) of less than a year. A while back, I had to go off the pill for health reasons, and in the interim between stopping/starting new BC, my boyfriend assured me that he had a vasectomy and didn't need to use condoms.

When I ended things with him, I was overdue for my period by a few days, but my cycle is irregular so I didn’t think much of it at the time. Then a week went by and I got worried, so I told a few of my friends. At some point, this info got back to my ex, and he asked to see me. I refused, at which point he told me he’d never had a vasectomy and there was a chance I was pregnant.

I blew up at him hearing that, and somewhere in our conversation he thought it would be a good idea to talk about helping me care for the baby. I’d already made it very clear that if BC ever failed I would get an abortion. As soon as I mentioned that, though, he got upset and brought up marrying me and telling me that I couldn't unilaterally decide to get an abortion without him. I’ve since taken an at-home pregnancy test that came back positive but am waiting to see my doctor to confirm. Ex has been relentless with the idea of marriage and preventing me from getting an abortion. We live in a red state, so he may have rights as the father, I’m not sure. WIBTAH if I went forward with the abortion anyway?