Are you on any medicines or have you changed your day any, that it starts about the same time? I know I have meds I'm supposed to take at certain times and if I change the time or miss them different things can happen? What are you doing right before? Sometimes I'll catch myself in odd states if I have been reading and something I've read has sparked a thought I am not aware of. I would discuss it with your therapist? That and maybe get a good physical from your doctor, have hormone and other things checked to make sure there isn't some medical problem.