Ob-Gyn questions? Ask a gynecologist online.
You will need to make an appointment with a doctor to have a swab test done, to determine if indeed you are infected. If you currently don't have a doctor, then what you can do is go to your local Planned Parenthood clinic. The irritation could be due to infection, or masturbation so this needs to be evaluated.
Two weeks ago, I started to have kidney pain, willing to