Curious of what could be happening

Im going to try explain somewhat what i mean by the title i write 

I was talking to a friend today asking about how i am since i dont realise when i act different my friend explained to me that "It sounds like your emotions take over you when you don't notice it sometimes, like unstable"

i trust my friend completely and my friend wouldn't  say that  if it wasnt true 

and i think my dad notices cause he said to my psychitrist that my behaviour is erratic at times and very unpredictable 

i really cant tell what's happening in my head sometimes