Hey Mark, I concur with the suggestion that you should see a Dr./Cardiologist about any other potential causes. If ruled out, I do think there is some validity to the Anxiety suggestions. I had similar "alarmist waking" (without the alarm) after diagnosis. The simple fact that it swelled to larger than the original size (a common and expected reaction to your treatment, but just because you know something doesn't mean you have to like it) would cause anxiety in most folks. I'm gonna add my two cents because everyone is different, and I don't know your physical conditions or limitations - but I bought into the take a pill to counteract the anxiety, and I found I would crash later. Then I found running would help immensely, or other phsical exsursion. Somebody else in this thread mentioned natural, and had the jogging not fixed it, I was considereing accupuncture as my Drs. even seemed to give it credance.
Good Luck, Jules