Woowoo,
It does not sound dumb. It sounds like obsessive compulsive worry. This is not a diagnosis, but it does sound like it.

It is because it is out of your control that you do worry so much.

I really want to urge you to see a professional about this. It sounds like it is getting worse as time passes and it is obviously causing you stress. We here, can offer support and someone to listen and are happy to do that, but a professional could probably help you get by this so that it is not such a disruption in your life.

What does your girl friend say when you mention it to her?