I have had low blood pressure since I took Sulfamethoxazole for 5 and a half days in June or July. My blood pressure recently has also been going high briefly (136 over 80), then returning to the usual low (around 96 over 60 something). In the last week I have developed pain in my lower back, mostly on the right side, pain and swelling under my right ribs, swelling on lower right abdomen when lying down, pain in between my shoulder blades, and occassional headache behind my right eye. When I try to take vitamins my bloodpressure goes to 150 over 110 until i drink lots of water then it goes back down. When I eat some foods the swelling under my rib cage seems worse for a while. I can't sleep on my right side without feeling pain like I'm crushing organs.
What could this be? Could I have kidney stones, and/or gallstones?