Abusive marriage

I left my abusive my marriage with my son I have with my abuser a year ago and I feel so lost. I feel like everyone around me has their life together while mine is falling apart as I am trying to pick up the pieces again. I feel so guilty that I wasn’t more careful of who I had a son with because now my son will grow up without a father. I also feel like I’ve really lost myself and I’m trying to figure out who I am again. Has anyone else experienced this?