I feel trapped.

I immigrated to live with my husband 6 months after we had got married last year. I arrived in the US in March and shortly after that discovered he has a drinking problem. I confronted him about it and he is now seeking help. A few weeks after discovering that I found out I was pregnant. Before getting married we had discussed starting a family as soon as possible and we were both in agreement with this so this was not a surprise pregnancy it was expected as we were trying to conceive. A few weeks after finding out I was pregnant I also found out that in the two years that we were engaged before getting married my husband, then fiancé, was chatting to other girls. I came across this when I found numerous contacts on his laptop with girls first names and Tinder next to them. I confronted him about it and he told me that when he was away working it was something that he did with the guys he worked with because all of them were doing it and for him it was a form of validation and he enjoyed seeing how many girls liked him and he did nothing more than just chat to them. I thought that I was okay with everything and I could move passed it all but I am not. I feel betrayed, hurt and angry. I feel like I cannot trust him because he was able to hide things from me so meticulously for the two years while we were together and I feel like everything he says is a lie. I feel like he is not the man I agreed to marry. Right now I also feel like the baby is the only thing keeping me from leaving and going back home.