I'm concerned that I may have diabetes. For sometime I have experienced blurry vision at certain parts of the day that comes and goes. I frequently find that my hands or feet have fallen asleep. Recently I had a possible urinary tract infection and a case of prostatitis that will not go away. I have also had a lot of flank pain. I do not believe that these symptoms are caused by an std because I have been tested for them and it came up negative. I am very active and do some form of physical activity whether it be sports, lifting or running every day. I also eat a lot (3500 to 4500 calories a day)and experience a lot of fatigue, but i am not sure if this is due to the athletics. Another thing that worries me is my diet is pretty terrible and consists of a lot of gas station food every day. What should i do?