First of, I am sorry to hear about your health problem Gizmo. I really wish you well. Secondly, I wholeheartedly agree with Cauz (I know that doesn't happen often ). Get your Hershey Highway (lol) checked, seriously!

You are way too effing young to be having this type of digestive problems.
The non-stop hunger could also be a tape worm or something along those lines. I am not a doctor but in any event get checked by multiple docs if you need to.
Also do not rely on those medications, actually find natural alternative. Again, as Cauz mentioned, the $$ is not in the cure, it is in the treatment so 90% (if not 100%) of the diseases out there can be cure and not necessarily with man-made drugs either.

Anything short of emergency medical treatment or surgery, can be treated by means of natural methods, herbs, etc.
Either way, I wish you the best! I hope you get your health back, if you are indeed going to get married soon, you will need it!

ttfn,