Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...
This was informative, about cortisol levels on awakening.
http://en.wikipedia.org/wiki/Cortisol_awakening_response
Basically, what I got out of it is that stress and anxiety makes this worse. Great, but that is why we are here. It's like a vicious cycle. Sorry, don't have an answer that is of any real use. Maybe someone will reply with some ideas.
If it keeps getting worse you should consult your doctor or therapist to see if there is a better medication to treat your anxiety.
Good Luck and Best Wishes