go to a doctor. now. you can call them up and do as others said, ask if there is any discount for cash up front. even if not, it doesn't matter. itll cost, but as previously stated the big time costs are due to hospital ROOMS. if you go and see a general doc, they can often do simple tests, although you won't get the results for a few days likely. im not sure if they can check for diabetes or not, probably depends on the clinic. but simply talking to the doc in the office will be a big help, telling him your symptoms and such. to me, it does sound like diabetes, especially with the thirst and fainting. diabetes can cause a lot of other more serious problems, and really is often fairly cheap to treat, most prescription meds are generic. i am in my third year of pharmacy school and we haven't covered diabetes in depth yet but from what i know i wouldn't waste time seeing a doc or letting cost scare you away. basic labs and a visit will probably run you several hundred bucks, but assuming you aren't in a life threatening situation it shouldn't be much more