I have periods of fluctuating BP, where I will have a terrible headache and head pressure along with nausea. I'll check my BP and it will be like 178/94 with heart rate of 60, and I'll be breathing fast. A couple of hours later, it will be 120/64 with heart rate of 44 and the headache will be almost gone. I'm on three BP meds, Lisinopril 10 mg bid, Coreg .25 bid, and Verapamil 240 bid, which I take faithfully. These bouts just hit out of the blue, and along with them, I usually experience muscle pain, extreme fatigue, muscle cramping and inability to relax my muscles, and frequent waking in the night. When my BP is really high and I'm trying to sleep, every time I begin to fall asleep, I feel like I quit breathing and I awake immediately with a start and must breathe fast to "catch up" on air. It's a feeling that makes me not want to fall asleep and is very disconcerting. Any ideas as to what is going on? I'm a 51 y/o female.