This sounds like OCD to me. The thoughts are intrusive and NOT what you want at all. Sometimes a mother has thoughts about hurting her child when she really LOVEs her children and would NEVER hurt them.

I've had blasphemous thoughts that I felt tremdous guilt over. I couldn't walk past a cross in my home or go to church. I'm much better now. Luvox, Paxil, Anafranil, are some of the medications they use for OCD. The thoughts occur to most people as passing thoughts but an OCD person gets horrified and obssesses on them.