Christians! Help!..............?

I need help! I don't know whats going on with me? I have a serious case of Blasphemous thoughts that I don't want? Either they come randomly, or at a time when I'm confused about the bible, or sometimes if somethings not going my way. I can't control them, but I try my best to rebuke them out of my mind? I just need some advice and counciling...The thoughts scare me..I feel tormented by them...How many christian go through this? Is this normal? I know how the bible says God knows our thoughts and we will also be judged by them...