I Am Not Doing So Well Right Now

My moods are all over the place! I can go to bed feeling perfectly fine and happy, then wake up in the morning in a terrible mood. I feel like I'm constantly saying the wrong thing. I know some of the things I've said in the past week have hurt people I care about. I never intended to do that. I can't explain it and there isn't really a reason as to why I feel this way, I'm generally not an emotional person so these feelings are scaring me.