I have some questions for all you ladies??

So me and my man have been together 4years next month sometimes I get a bad feeling like if he is doing me wrong & granted he does everything I ask & swears he would never but for some reason I just don’t believe him tbh he never goes out never leaves really unless it’s to go to work how do I not feel this way anymore. A Previous relationship I was in I got cheated on well at work so now it is always in the back of my head and when I think about him doing anything behind my back I instantly get upset and start to give him an attitude or for example sometimes he will say that he’s tired and is going to go to sleep when I leave for work at 9:45am he gets off of work at 6am but really once I leave he stays up till 2pm and that’s why he can’t wake up at 6-7pm when I get home to spend time with me before he goes to work (oh he works 3rd & I work 2nd shift) we have been trying to have a baby for the last 4 months on top of it he tells me it’s all in my head ( do u think it is)? He was a cheater when we first meet he cheated with me at our job while his girl was at home & said he only did it cause he felt like she was a cheater & she was he went home early one day and caught her dealer in his bed in his boxers. Plus I start fights with him a lot lately because I don’t feel wanted at times etc Sorry so long there is so much to say and I just need other females opinions