Sounds like you have a bacterial or viral infection with a fever that is causing you the headaches and sweats
Go and see your doctor and take a urine specimen to check you out for any urinary infection.
It sounds like it might be diabetes. I say you need to see a doctor asap. I mean it. Don't delay or go to emerg. Describe your symptoms and ask for a blood glucose level test. If you know someone who has diabetes ask to use their monitor to test your blood if you don't want to go to emerg. If your level is higher than 14 or in the 170 range depending on their settings go to the hospital. By the way I'm a nurse and studying in diabetes education so I encourage you to get checked asap.
Time to go see a doctor. You could be pregnant, have diabetes, or be sick in some other way. You need to be treated. Blessings - Blu