OP I am sorry you are dealing with this.
There is no right answer. I suffered with mental illness in my teens. When I had my dd at 21 I knew I could not have handled a disabled child. It was my biggest fear. Mentally I wasn't strong enough and me and dh had decided an abortion was the right thing is something was wrong.
Maybe I was wrong, maybe I could have coped. But in my heart I felt I couldn't.
Roll on 7 years later when I had ds. We didn't have the extra tests for Down's syndrome. Because there would have been no way I would have had an abortion. Yes we would have been more prepared if we had known. But i wasn't going to take the small risk of miscarriage to have fluid tested. An abortion wasn't an option. I was in a completely different place.
Dd was unexpected.
But before we started trying for ds. Me and dh did undergo some testing as my family has a large amount of a certain genetic disease. I didn't carry the gene neither did he. I never came up with an answer of what I would do if we were both carriers.
It's not an easy decision. And how you feel now, may be completely different to how you feel in a few years.
Of course anything could happen and dd could have become disabled at birth or since then. Or been born with something we didn't see coming or the genetic disease. In which case of course I would love and care for her. But at the time I was pregnant with her it wasn't the choice I would have made.
I have the upmost respect of people who care for disabled children but believe whatever decision anyone makes, is right for them at that time.