[Funkduder]

I think you need a marriage consultant XD....
But on a more serious note, let's try to clear the air a bit before making any quick conclusions (he wouldn't have married you if you weren't his one but anyways): it doesn't seem like your kids are very old, so you must be working hard to take care of them. On the flip side your husband is working both a full time job and a part-time job so as you said, he's never sleeping. That's what can be said for sure.

Now let's focus on the problem: You guys fight a lot and there seems to be a lot of misunderstanding that causes that fighting and that fighting to escalate into words that rather not have been said in the first place.
Do you start most of the fights, or does he? and do you guys apologize some point after those fights? I think that's a good place to start.