Hello,
Burning vagina can be due to a number of causes. First of all it can be due to allergic reaction or contact dermatitis to your undergarments, sanitary napkins or tampons, soaps etc. There is no change in the color or smell of discharge in this case.
Secondly, it can be due to vaginal infections or STD’s if there is a history of any unprotected intercourse. So if you are having frequent vaginal discharge along with the other symptoms, you can consult your gynecologist and get a vaginal examination done to confirm the cause of it and then take the medications accordingly.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Probably a yeast infection. There's some over the counter creams you can get for that