Very insecure!

Has anyone who's been pregnant felt even more insecure about their SO such as thinking that he's cheating and talking to other women, although that's not the case? I became insecure when my SO cheated on me when we first started talking and I always had my doubts since. However, since getting caught, he's definitely done a 360. He stopped talking to certain people, changed his number, doesn't take his phone with him everywhere he goes, has his phone on silent, and some other stuff he use to do that he doesn't do anymore. But ever since I found out I was pregnant, I feel even more insecure. I accuse him of talking to someone all the time. I'm always questioning him. He's home everyday after work but if he leaves on the weekend for a little bit, I start assuming stuff. We even got into a really huge argument this past Sunday and many times I feel like crap because it's my hormones and I feel like I can't control it. So I know it's taking a toll on our relationship. Just wondering if anyone every experienced this.