Advice

So I broke up with my boyfriend but we were only apart for two days before getting back together. During that time, he allowed another woman to perform oral on him. It was about 3 months ago and I just found out, how should I feel? Should I be angry? (Currently I'm not upset, because Idk how to even process it). I just need advice from you all, and what do you think I should do as far as our current relationship. (I now pregnant and I recently found out 😔).