What should I do ?

So last night when my baby father was sleeping I went They his phone but my women’s intuition was just telling me he’s been messing with other females and I was right I went thru it and seen that he had sex with someone else and was talking to other females , were not in a relation but I am 6 months pregnant carrying his baby and we talk every day and he told me that he was not doing anything with anybody it’s going on 4 months sense we have had sex .... he doesn’t know that I went thru his phone and I’m trying to act normal and remain calm , I feel so betrayed ... I need some kind of advice I’m feeling hurt and kind of angry