Why?

Have you ever had a moment when something slipped out of your mouth, and you accidently said something you know you shouldn't have? Then you realize why in the world did you say that. Well it happens to me all the time. For some reason, during a particular time of the month (if you know what I mean), I tend to always say random stuff. I don't understand why, but I do, and I don't like it. I start saying random stuff, and then I completely regret saying it. Then in the end, it's too late to take it back, and I'd have to live with the guilt of saying whatever I said. This happens so much to me, that you'd think I learned from my mistake, but it's so hard to do so. It's just something that I have no control over. Sometimes I feel like someone has taken over my body and controlled it themself. Thus, it's so hard to control what I say during that time. It'd be nice to be able to do so, that way I wouldn't have so much guilt and regret, and deal with the situation of apologizing to the person. So I'm hoping nobody out there is the same way like this, because it's not so great of a feeling =/