Well, I used to have the same problem that you have. Actually it wasn't 7:00 AM, more like 6:30 which is really (!) early for me as I prefer working at night. So I drank up to 7 or 8 cups a day which really made me feel sick after some time. But what I can advice now is yerba mate. Since I've known it I don't drink coffee at all. It's really healthy and got a lot more caffeine in it than coffee.