What in the world is going on?

I have "this feeling"...

Has anyone else suffered from a feeling that they couldn't quite understand? It's like I know something is going to happen, just don't know what or if it will be good or bad. This is not a new feeling; I have had it for several months now but today I am anxious about it more than usual. Just needed to "put it out there" and see if anyone else can relate to this feeling!?!