Marjorie,
Rapid pulse, headache and pain....and it isn't even tax season! Seriously, these symptoms are telling you something isn't right. If you have not done so already, consider visiting a board-certified gastroenterologist who can rule out some kind of non-descript digestive disorder like celiac sprue (more common that you think and often presents with similar symptoms)or food allergies. This kind of docmentation from a physician might help for insurance coverage purposes as well! In my clinical practice I suggest that patients who have a difficult time digesting foods keep a food diary and note their physical symptoms after each meal. Patterns of intolerance may surface and give you a better idea of what you can, and can't eat. In addition, do your heart rate a favor and avoid all "stimulants"--caffeinated beverages, chocolate and even spices like peppermint. See if that makes a difference.
Best,
Kim Dalzell, PhD, RD, LD
Director, Holistic Nutrition Services
Cancer Resource Center
Cancer Treatment Centers of America