Bit of background, been with DH 6years, have a young DD together. Pregnancy was unplanned but very much wanted. DH has issues with alcohol and has depressive episodes in which he can become very angry over small slights, perceived or real.
I was working yesterday and DH was watching toddler DD. I came in as he was putting her to bed and as soon as she was asleep he opened a bottle of vodka. I knew his plan was to sit in front of the TV getting pissed and chatting rubbish so I went upstairs, showered and fell asleep. I knew he was planning to stay up late drinking as he's on night shift tonight and will often stay up the night before and sleep the next day. I woke up around 2am with a text from DH saying he would sleep downstairs to let me get some sleep (as he snores) I went down to tell him that he would be better sleeping upstairs, as I wasn't working the next day. I felt he was using the "sleeping downstairs" as an excuse to drink more (although i didn't say that). He said that he was fine sleeping downstairs and I should go back up and get more sleep. I reiterated that he'd be better going upstairs as there was no need for him to sleep downstairs if I wasn't working and I was worried his back would be sore. To clarify I wasn't saying he should go to bed at that minute in time, just whenever he was ready.
He then became very snappy and confrontational saying that he was trying to do me a favour and i was throwing it back in his face. He starting swearing so I left the room and went back upstairs. I couldn't sleep then as I was upset. He texted to say that he was annoyed that " he had tried to do me a favour by staying downstairs to let me sleep but it was a kick in the teeth for me to be awake and not appreciate his offer of sleeping downstairs" he added that I "better not complain about being tired tomorrow as he was giving me ample opportunity to rest but I was throwing it back in his face". He later admitted it was an overreaction and apologised but said "in his head I was being unappreciative of him trying to let me rest". I had literally just suggested he would be better sleeping in bed. When he did eventually come to bed he started ranting again at how stupid I was for borrowing his charger and "my stupidity is getting beyond a joke".
My charger was downstairs in my workbag but after the argument I didn't want to go down to get it. He immediately apologised again for losing his temper. I told him his behaviour was unacceptable and he needed help with his anger. My question is, is this behaviour/way of thinking normal for someone who is alcohol dependent? It worried me how he managed to twist my words so much and change the narrative. It's the first time I've thought he might actually be a bit unstable. He agreed that I wasn't being unappreciative and "it was just in his head". But now I feel like I can't say anything in case it gets twisted in his mind and causes another row.