6 months ago I had a tetanus shot and I developed a bad infection that left half my arm paralyzed. The doctor prescribed me doxycycline for 10 days. My arm healed but by day 10 I could not keep food down. Ever since then I can go 20 days without a bowel movement. Prior to this I had a bowel movement 3 times per day. I am an avid runner and only consume organic unprocessed foods. Fiber, exercise and water are not the issue. I have visited 2 gastroenterologists and an internist and after countless exams and blood tests they can find nothing wrong. I am desperate!! The strongest prescription laxatives do NOT work. My abdomen is so distended it hurts to even sit. The doctors have started to ignore me saying it will pass. It has been 6 months and nothing!! Please help me!!!! I have consumed gallons of kefir, probiotics and yogurt and it does nothing. I got some herbs from a Chinese doctor, they worked for a week and then just stopped. I need help!!!! I was previously not much of a sweet eater, but I have noticed my desire for sweet things increase 1000 fold. When I do manage to have a bowel movement it has a white powdery coating to it. The doctors are absolutely useless. I am convinced they gave me the problem! PLEASE PLEASE HELP ME!!!! I am only 24 years old and this is ruining my life!!!!