Hurt....

My partner and I had a miscarriage before this pregnancy. We broke up right before I found out I was pregnant again. I had no idea I was even pregnant till thanksgiving week. ( last year) Any who.. we decided to take things slow and try to work on getting back together. We lived together during the pregnancy.. I found out he was talking to a girl on tinder, his ex telling him my business with out pregnancy like my health problems and etc.. I asked him if there was any other girls and he said no.. I found out he was messaging another girl the day we found out I was pregnant!!! Saying he would have sex with her because she offered.. not to mention she was in a relationship. He said nothing happened. But how do I know? Then magically when the baby comes he is totally in it to win it, it seems like it.. but there is this one girl who likes him I just know it, who ask to see our baby but straight up says she doesn’t like me and I told him how I felt bout it.. he said he wouldn’t allow her over anymore. I feel uncomfortable because she calls him” brother” and touches him a lot. She also doesn’t like me so why would I want her around my baby. Well she texted him today asking pictures to see her I know it’s just pics.. but then she said you both are adorable.. and I just can’t! I feel like by sending pictures. He is just encouraging her. Im so hurt from the girl situation from my pregnancy. Am I wrong??