I think I know exactly what you mean. I feel better now but for a long time, every day when I woke up, I had that feeling, that anxiety...for no reason! Nevertheless, I had to prepare myself to go to work and it was hell. So what I did was getting up earlier to give myself some time to calm down. I watched some TV or listened to the radio, something to distract me...and slowly, that feeling faded away. This is only a short time solution, though. As some people have said here, you need to find out why you feel like that. Are you coming off some drug (even if it was like, a long time ago in your eyes) or has something new happened in your life? If you think you can't handle it by yourself, go see a doctor and he might give you some anti anxiety pills or something. That's what I did. I remember aisking the doctor "will I have to take these pills forever?" and he explained me that it's just for a while, until your brain "fixes" itself.
Some are against any sort of medication but in my case, it helped! Also, as I had to drive myself to work every day, I had no choice if I wanted to get there, ready to work...or get there at all!