Having trust issues/overthinking/or gut feeling

So yes I’m sure most of you will say if you don’t have trust then end the relationship! But I’m sure I’m not the only one who has these problems. My boyfriend has never gave me a reason not to trust him he is very good to me and my daughter who biologically isn’t his and we have a baby on the way! We are in long distance relationship and I’m having a hard time trusting him and overthinking things assuming crap in my head or have a gut feeling someone is at his apartment which I doubt there is. I feel like my brain is so f’d from my pass relationship it’s unreal in my past one I got left when I was pregnant. I’m always giving myself a hard time and him and I’m scared I’m going to ruin our relationship! He has done so much for me and after I have my daughter I’ll be moving in with him but seems like forever.... When I was up there for couple weeks I was at piece I felt at home as family but now when I come back to my hometown things get worse. 😭 and on top that I get jealous. I had to stop working because of my pregnancy and he pays my bills and helps me he will even spend $500 on a rental car just to drive 6 hours to come see me and stay for few days. When he goes to bed early I assume things. I thought about getting therapy. I know I’ll get a lot back lash on this post but I know I’m not the only one who went through things like this because of past relationships.