EXPERT INPUT PLEASE!!!! Looking for answers to 20 yrs of multiple unexplained symptoms.

I started as a child w/ a milk allergy, at which point all of my teeth turned gray and died. A three years later, I developed frequent UTIs and was hospitalized at one point, thinking I had the flu. Two years go by and I can't keep food down. I have a hiatal hernia. over the next two years I go from weighing 85 lbs to the 190's by the time I am 14. I then have acid reflux. At 15, I vomit on a daily basis. I have a gall stone the size of a golf ball. It's removed, I lose 16 lbs & immediately gain it back. At 18 I stop having bowel movements, my temperature spikes, I can't keep food down, ER provides super power laxatives. At 21 I start having horrible pain in my stomach, spreads into my chest & spine, leaving me in the fetal position. Also, more than 20 new cavaties have developed in my teeth. At 22, I stop having bowel movements again, can't keep food down, undergo upper & lower scopes, everything looks fine. Prescribed protonix reglan & miralax. Start having pain near my ovaries, had constant vaginal bleeding for 6 months, progestin to stop the bleeding, ultrasound-results normal, vitamins for overall health. Developed pain in my left side under ribs, sometimes dull, sometimes so sharp I couldn't stand. Undergo 2nd upper scope in 13 months. Prescribed Ibuprofen, no benefit, pills for nerve pain-no benefit, pills for colon pain-no benefit, changed from protonix to nexium-a wk ago, no benefit yet. The pain has subsided over the last month or so, but I still experience vomiting, especially if I eat anything with sugar in it. My diet is healthy, I exercise on a regular basis, I don't have a lot of stress, other than the 39 doctors visits in 2008. Is there something I can look into to help me find a cause. My doctors have been unable to find one as of yet. And I'm exhausted, and tired of having one problem after another with no answers. I'm 23, and I feel like I'm 63. I do have regular days, where I feel fine other than the fatigue, but they come and go, and I don't know where to start.