My husband makes my PP worse

Since day one of getting back from the hospital, he spend days saying our babies hair was too straight like Hispanic hair... (insinuating the kid is not his) he spent days looking up how the babies hair should be, I just kept crying about it cuz the accusations hurt. But the accusations never stop, it’s been two months now, I went out around the corner to see a yard sale, and he’s upset I missed a call from him and was wondering what I needed to do without the baby (it was cold and I wanted to quickly see and come home) I always talk about this and how much it bothers me but, 5 years later it’s still going on and for no reason (I have never had infidelity issues with him whatsoever) I don’t know what to do anymore, I’m just trying to raise our son and can’t keep dealing with this