DH is usually really lovely he can be grumpy as we all can at times but never horrible to me.
After a normal evening of I love yous and making each other hot drinks, playing with our baby and washing up together this happens...
He has been offering to put some steroid solution on the back of my scalp because it's really flared up lately.
(This is something I'm embarrassed /ashamed about but he's always willingly done it if not offered to)
Anyway earlier in the eve I asked if he could put some on me later and he agreed.
When we sat down after I got baby to sleep, I asked him and he huffed and puffed and said that I always ask him when it's late (There's no other time when we're together 
)
I said not to worry and started cack handedly attempting to put it on myself, he got up and attempted to man handle me into the position that I normally sit in for him to apply this solution but I didn't want him to because he didn't want to.
He then called me a fucking idiot twice. I was quite shocked and he hasn't apologised. Just told me to "deal with it" and that I was being a proud fucking idiot.
I said how dare you and told him he's not to ever call me that again.
I'm now reeling in the spare room I don't want my baby to grow up hearing daddy call mummy such horrible things.
Even the word idiot is making me wonder if he even respects me.
So out of character- he is literally the most lovely man apart from this one incident. But it's a hard thing to get over especially with no forth coming apologies.
What should I do?
Tia