Quick Marriage

I have only been married for a short period of time, and it already doesn't feel right. To be honest, the month or two leading up everything felt off but I felt I was letting my parents, family, friends, myself, etc down. We were together for years, so now why all of a sudden would I not want to get married? Basically I found out some really shitty things about him / things he was doing in the weeks before but I felt it was too far to back out. I found out the kinds of things that have made me completely lose trust, faith in a partner, and even lose myself. But I married anyway. Anyone ever find themself in this situation? Now I  pregnant and am soooo happy to be a mom, but feel even more stuck in the relationship/ feel like a failure.