First off, I know I had a bad day yesterday and ate a lot of things I shouldn't have..... I guess it was my eating disorder rearing her head....And I will deal with that.

That said, I am in horrible pain that started last night. I had popcorn in the morning, some frozen pizza for lunch and frozen yogurt later.....

I have been having pretty severe abdominal pain and back pain . It's almost like bad diarrhea pains but I don't have diarrhea and the pain is also in my back. I'm worried it could be my gallbladder although I don't know because I have never had issues with it before. Does anyone know how that feels?

Gall bladder issues can present themselves in many ways. Yes, pain is one of them, and sometimes nausea. I had a couple of gall bladder attacks but mine were before I ever had surgery. You need to go to the doctor and make sure. You ate a lot of food that was not on your diet and that could very well have brought on the attack but its eating fatty foods that causes gall stones and when they are in your gall bladder they can cause a lot of pain and sometimes you don't even know they are there. Don't take any chances, get to a clinic and let a doctor examine you.

I my NUT advised no popcorn for at least one year out. She said the kernel pieces, like the ones that get stuck between your teeth can actually get stuck in your sleeve. Ouch!

I would suggest keep moving around and drinking your fluids. Don't let one bad day get you down!