I seem to continually belch throughout the day. If I eat or drink it does get worse. When the symptoms are present, I usually get a fever and my intestine/lower stomach become bloated. I become very constipated and symptoms can usually last a couple weeks. After a couple weeks the sympotms go away. Then, will return a month or so later. My blood pressure rises dramatically during the symptoms similar signs of a heart attack. I have had a stress test and everything checks out fine. They did give me some high blood pressure medicine and I take it daily. When I am in the period with no symptoms I can go for days without having any blood pressure issues....any idea?