What? What is it? TELL ME!

I'm nervous. Anxious. Tense. Apprehensive about something, but I don't know what it is. It feels like there's something BIG around the corner, but I can't imagine what it is. This is my night to relax, just me and the Cubs. So why aren't I relaxed? What is it that's gnawing away at me? I wish it would just happen already, so I could deal with it and get past it.