need information please

Will anyone please give me input? I think my doctor thinks Iam a hypochondriac and Iam starting to feel that way myself. Something isn't so correct with me. At age 27 out of the blue I became lactose intolerant.At age 39 I suddenly stopped being able to tolerate eatting meat, high fatty foods and high protien foods. My stomach churns crippling me over with pain and very painful gas and explosive diahrhea. In the last 2 years I have to urinate constantly like an average of every 30 minutes. On a bad day I urinate every 4 to 15 minutes. My bladder leaks and sometimes cramps....only going makes me feel better,as with the IBS. I have cramps all the time from the IBS. The doctor who did my colonoscopy said to me that my poor diet aggravates my diverculosis condition and basically I need to advoid pollutants like stress. I can't eat much food without having explosive diahrhea so what do I do?I have a thick mucus discharge from my vagina. Ihave developed a new symptom being when I crouch down, my right ankle lower leg area about kills me in what feels like nerve pain. It takes a good 2 or 4 hours for the pain to fully subside and a few days for the incident to subside in my head. Can one person truly have so many things wrong with them and it all not be related? The urologists said he may run some tests on my next visit but for now he just told me to drink 2 quarts of water a day totally dismissing what I told him which was Iam always thirsty and nothing quenches my thirst. When I got home and measured out what 2 quarts of water is, I about laughed my head off. I drink 2 to 2 and a half quarts a day most days...I told the uro;ogist that if I don't drink that I dehydrate and within a few hours even my voice is dry. I get up at night to get a drink of water. My family doctor told me that drinking water is fine and ignored me when I tried to tell her I can't stay out of the bathroom. Thanks.