Martial issues….

So my husband and I have had our ups and downs like every other marriage. Recently (3 weeks ago) we decided we needed a breather from one another after an argument. To BE CLEAR….not separating, breaking up none of that…just a breath. So he ended up staying in a hotel…yesssss it was that rough…his moms was busy so he couldn’t stay there and his granny was out of town so he had no other choice. Come to find out he had reached out to this chick he used to sleep on and off throughout his other relationships with before we got married (this same chick also popped up at our engagement celebration at our church on Sunday) all he said was hey. But that shit still hurts…like when tf did we decided cheating was ok?! (By definition for our marriage this is cheating) …he said that was his only time ever doing it and the girl actually blocked him and told someone she knew who went to my school that he had reached out…basically so it could get to me so I would know. Long story short, I took him back after we split for a few days again. Theeennnn I told him the girl reached out to me and asked him if there was anything else I should know and if he ever reached out to her before and he said “well now that I think about it, yes…” but I only said hi that time too.” Ladies I’m fucking livid. I stupidly took him back and I’m 5 months pregnant with his 3rd baby and I can’t shake the feeling that I’m making the wrong decision. We’re supposed to be moving in our new place in a week and a half, but when he pulled the bullshit he did I filed for a separate place and got approved. I just can’t stop feeling like I made the wrong choice. I don’t trust him at all…some days are good, but I flip on him because I just am still hurt. Idk wtf I need to do. I need advice. Please don’t judge me on this issue or my spelling or any of that dumb stuff. I just need judgement free opinions/ advice.