For H pyroli your doctor would have prescribed two different antibiotics, together with another drug that reduces your stomach acid. Lowering stomach acid helps the antibiotics work more effectively. This treatment is sometimes referred to as triple therapy. Side effects of these medications are associated with metallic taste, nausea and diarrhea. Headache could be quite common. The symptoms associated with your mastrubation seems to be due to some other reasons,  which your gastroenterologist will be able to clarify and maybe he would refer you to an Urologist,  if required.