Irritated by my man, help!!

Randomly I will get irritated by little things that my man does. The way he says what after I explain something, the way his complaining voice sounds, the way he holds his mouth, it really is stupid little things and my irritation gets bad around my monthly of course. Any guy I've dated, I get this way, personally I think it's me. But I just need some advice on how to handle it better and not push him away because I've found an amazing man that really does love me even when I'm a bitch.  So please, help!!!