Should I be worried?

Me and my fiancé are obviously serious. We plan to be married in July of this year (as long as this virus becomes contained; if not we will have to postpone..)

A little about my fiancé. He isn’t really the type to really care for his body image. Granted he is blessed with a hell of a body and should not care anyway because, oooh girl. Anyway, he doesn’t really care about his body image. I mean he has always talked about “getting back into shape” and tone and such. Which toning I get, he has always wanted to get a little bigger muscle wise and such and he has done the protein shakes. But it hasn’t been like a big deal for him. He also doesn’t really wear cologne unless we are going out or for an occasion. But this morning he told me, he and a buddy may go to the gym on the facility. (He’s a correctional officer) for about an hour after work. He says his buddy is the one who wants to go the gym but just doesn’t want to go alone and so he said he would go with him.

In the past he has cheated before but we have both worked past it and he has worked very hard to regain my trust. I know a lot of women are going to say I’m asking for it again if he is cheating again. I know that. The point is, we are both finally in a good spot in our relationship, I feel like everything is good. But I’m a person who believes dreams mean something no matter how wonky that may seem. And I have had some dreams about him being with someone else or breaking up with me to be with someone else. And now he came to me saying he is going to start hitting the gym at work. And if anyone who has anyone in corrections know, that work place is like high school on steroids.. I’m trying not to jump to conclusions because I’ve been trying to also move past that betrayal and such and trying to not turn “toxic” every time he wants to do something himself. I’m sorry if this doesn’t make any sense, my thoughts run like no other. Should I be worried or no?