You're on the right track with your thoughts I was in the hospital last year from a thyroid storm that nearly (literally) starved me to death. I also had stomach probs and diarrhea before the colonoscopy. The good thing about your gallon-sized cocktail is that you're experienced with its symptoms but when its done, it doesn't come back, later! And, it doesn't include things like cramping... way less than what you've been through. Please don't dread it too much - it will get you diagosed and on treatment that brings you real relief, It's all good