So sorry to hear about
what you are going through. What happened with me is I would wake up almost every night in a bed full of (crap) excuse me, but this is exactly what it was. Every time I would eat I would have to run to the bathroom. Finally I got so dehydrated, tired and confused that I just could not focus anymore. I couldn't even drive my car cause I couldn't focus on the road.
Anything I would put in my mouth would go straight through. Being so tired all the time was my worse symptom though. Finally, I went to see the doctor and he set me up for a colonoscopy and endoscopy right away. That is when they found out I had Celiac Disease. As soon as I started the Gluten and Wheat free diet, I stopped crapping myself, my energy level came back up and I felt so much better. I do tend to cheat once in a while and I end up paying for it, but hey, we all deserve a treat once in a while, right...
I would not put off the testing much longer if I were you cause this can cause very serious problems. If your doctor won't do the test, then I suggest you find one that will. Being on this diet has been very hard for me, but I think it saved my life. I eat alot of potatoes, veggies, white rice, chicken and fish, and fruits. I found out that going to the Health Food store was just not in my budget so I eat what I can without going there. If I want a donut I buy it at the Health store. I hope this has helped you and please email me again.