Tipsy/buzzed SO

So him and i have a son but long story short we just now are living together its been over a month and he does not drink as much as he used to but a few weeks ago he went to his soccer game which was at 7 and came back at 1:45am! Drunk! Not to mention he snores when he drinks so its fucking annoying. The next day he kept asking why i was mad like really? And then 2 days later i was stil mad well not realy mad more like disappointed and he got mad at me saying to he cant change what he did and hes sorry but to stop acting how i was acting which pissed me off even more. (I know he doesn't cheat on me thats a fact) what i hate is whenever i am mad because of that he keeps asking me in front of our son and in a angry tone and i grew up with my parents fighting so i dont want that for my children. Well.. today he went to go visit his cousin and came back with his voice all stupid which ugh he is tipsy buzzed or whatever and i try not to talk to him or keeo conversation going because anything can tip him off and he gets mad cuz of that and just asks me why i always treat him like that, what has he done to me and why am i mad or acting like this and he keeps asking me over and over even tho i already answered and expects me to be okay with him and he did this infront of our son that was almost half asleep and as i was carrying him in my arms and telling his dad to be quiet not infront of him, while covering his ears, he said, he can see too his eyes are open, i dont remember exactly wgat he said but pretty much he didnt give a fuck that our son would be listening or seeing him like that and then he told him something about me like i was the one starting anything if whatever. I couldnt help but let out the tears, in silence, meanwhile his dad turned around and fell asleep. Hes now asleep and i cant stop crying i feel so bad like i dont know how to explain and i have no one to talk to. I dont want my sister to think im exaggerating if i am because i honestly dont know if i am or not, i know it isnt right but should i be taking this?! If he were to wake up right now and see me crying he would be like why are you crying? And me telling him why he would say i exaggerate too much. I need advice. Im currently pregnant and dont want to go through this with two loves of my lives.