Fear of getting pregnant again

I had an abortion in December of last year. It was really hard for me, although it was 100% the right decision.

My issue is, I don’t know want more children, likely ever. I’m in birth control (ring) and use it as directed. My partner uses condoms, but I am just so paranoid I’m going to get pregnant again. It’s constantly on my mind, and hindering our relationship. I don’t want to have sex as much, and I just freak out. I never want an abortion again.

Does anyone else have this problem?