When you just snap

Has that ever happened?  When you just snap and you loose your head and you say what's in your head and you just don't sugar coat anything and later you find out its just mean to do that.
I just did that. But I didn't know what to feel I just don't feel it anymore if ive hurt someone.  From being a person who cares abput every damn thing. Ive gone to someone who chooses to not care that much sometimes. 
Is that really who I am. Or am I just making too big a fuss about it all and just trying to be someone else  cause you think thats what people want to see.
Or are you just loosing patience with your life.
I have a feeling it might be the last.