I need advice please

So I am 4 months pregnant but ever since we found out I'm pregnant my husband has been different.. we haven't had sex in over a month and honestly it makes me feel like maybe I'm just not pretty enough anymore and maybe getting too fat ... anyways i was looking through his phone because I had this gut feeling and seen that he had two unsaved numbers blocked so I decided to look them up . And it's two numbers for escorts .. i don't know what to do or what to even think .. my heart is broken I want to wake him up and slap him and him to explain but he has to wake up early and I can't get myself to do it what do y'all think...??