When is enough, enough??

My husband just has no respect for me.. Whether it be infidelity, porn, the way he talks to me.. Im currently 11 weeks pregnant, I dont work and I stay with family. We were suppose to be getting our own home.... And I find him on Craigslist looking at lonely housewives and going on youtube to try to watch porn. We've talked about how the things that he does makes me feel but he continues.. I feel like its a never ending cycle. When will I know when enough is enough?