Where's my head at?

I haven't been able to sleep well the last two nights. I just toss and turn, and lay wide awake. I'm anxious about something, but for the life of me I can't figure out what. I know the feeling. It's like I'm going to hyperventilate or be sick, or some mix of that. I want to sleep, I'm really tired - but the second I'm not distracting myself with various odds and ends, I'm freaking out all over again. Last night I kept repeating "tomorrow will be a good day" in my head, and I think it helped a little bit, 'coz I got more sleep than the night before, but it didn't fix anything.

Tomorrow is my first real session with my therapist. Maybe I'm freaking out about that? God, I don't know. I don't think I am - it's not on my mind when I'm trying to sleep, but maybe it's a subconscious thing. Hell, I'm feeling anxious right now - it's an antsy thing, where I want to get up and jog in place or do SOMEthing. But no matter what I do, the feeling is still there.