Been acting odd for a while, saying weird things, doing weird things - he's had a lot of stress on with his kids not wanting to visit and potential redundancy, money worries etc so I'm worried his mental health has taken a dive. Can't pin point exactly when he started acting odd but I remember a few weeks ago I said something that turned out to be wrong and he shouted at me "you think you know these things but you don't Nemo" and then denied saying it. Another one was during an argument he slapped my leg and shouted that he didn't agree with corduroy - I wasn't wearing corduroy but even if I was it was random and odd thing to say during an argument about the car.
At weekend we had a BBQ and we were all sat in the garden (my parents, his parents etc) and he came running out shouting "there's your family, there's your fucking family" and he sprayed squirty cream all over me whilst laughing and shouting there's your family. Our parents were really confused and his mum later asked me if he was ok so other people are obviously noticing it.
Other examples include a huge offensive rant on facebook about shoppers in asda (he never used to post on facebook let alone show himself to be an aggressive, intolerant arsehole!) and last night he did a night shift and at some point in the night took a photo of a poo he'd just done and sent me it asking if it looked healthy.
I've told him I'm worried and suggested we talk to a doctor, he has naturally refused. AIBU to go behind his back and tell the doctor about this recent change in personality? can they even do anything anyway?