Am I wrong for feelings a type of way ??

So my boyfriend just got released a month almost 2 months ago and also I just found out I was pregnant . So he told me about this ex he had like when we first started dating. Once he got out I found her Instagram or whatever but I noticed I was blocked…… Now I don’t know this girl from a can of paint never saw her never interacted with her on Instagram before. All I know is that he posted me but he didn’t tag me but she may have found my page from his followers. I removed her from his Instagram because I felt it was weird that she blocked me but followed him she also had her friend watching my page and I told him all of this. Fast forward one day we were sleep and i heard him say her name in his sleep i confronted him when he woke he said he didn’t and my friend everybody is saying I was tripping that triggered me to confront her to see what’s going she basically was saying a bunch of nothing saying she doesn’t want him and has him blocked and telling me to ask him over and over . So fast forward to now I noticed he followed her not to mention she said she had him blocked . So I confronted him about it he says I’m tripping and going crazy and my pregnancy is making me emotional. So I asked her again what’s going on THIS time she says she doesn’t want him but he did text her after he got released . I asked him he said he didn’t even when i asked him before he said he haven’t contacted her so Atp I don’t know if i can trust him and he still is following her Instagram even after I told him I didn’t feel comfortable. How should I feel ?