Since I got pregnant I can't stop masturbating, damn it

I'm one month pregnant but I don't know what the hell is wrong with me. Ever since I got pregnant, there isn't a day that goes by that I don't want to touch myself. Fuck, there are days when I jerk off three times and I even feel like it. I don't know if it's a craving or what the hell is wrong with me, but I need to touch my pussy every day to be able to sleep at night. My husband doesn't know anything...