I'm in the same situation, I may not bet 24, im 16, but ive been sick for 2 months and losing terrible weight, they just gave me medicine today, but I know how your feeling im so frustrated, they wont diagnose me, and i just also found out that i might have lymes on top of it. But i have researched IBS for my own, and i have found that it isnt caused by stress, though stress doesent help. I say you just keeping pushing to your doctors to test you for it, because I know its not fun, im at the point were i flip at my doctors if they take to long to get something done. Ive had to go into the ER twice now kus of it, today was the 2nd time actually, and it does hurt REALLY bad, i know. Ive been having D myself and ive lost about 15 pounds since ive been sick. I hope that you get the help you need and you dont have to wait as long as im waiting to get answers.
with all the luck,