How to move on

How do you move on from trauma from past relationships. I have bad anxiety and trust issues from my ex of 4 years but now I’m with a wonderful man who treats me amazing I’ve been with him for a year and I’m going to have his baby soon but I have really bad trust issues I’m always thinking he’s doing something when he’s most likely not. I have his location and still think stuff. I get anxiety when he doesn’t text me thinking he’s doing things. And I know he will get tired of this I’m so grateful that he’s been patient but I don’t want to keep on doing this to him. I don’t want to be like this either it’s draining. I just need some advice. I have no money for a therapist so that won’t be a option. I know some people have said insurance pays but I have Medicaid and I don’t think that’ll cover it. I’m 20..