The symptoms seem to indicate that there's an infection. To verify this, you have to check your urine with urine tests. You also need to run blood tests, CBC and electrolyte panels to see if there are signs of infection or inflammation. You may need to check your kidney function and glucose levels. You may need an I.V. fluid replacement to relieve symptoms and prevent dehydration.
Doctor, I'm experiencing pain and irritation during urination, and I think I'm going to have to go to the bathroom more often.