Why Does My Stomach Hurt After I Drink Water And

why does my stomach hurt after I drink water and it is not cold water and also after I drink juice or eat yogurt. Also after urinating andi do not have a UTI. Also the large muscle in my upper thigh by the groin that runds down to the foot pains a lot and stiffens and I can feel it in my lower groin also. another question I had H pylori once years back and had a endoscopy a few yrs ago for them to check for stomach pain in the lower abdome and it was ok. Is there any other method to check for H pylori since I have heard that if you have to have it checked any more after the first time which is by blood you have to detect it in the future using the Endoscopy is that true?