Hey. This could be an infection that can be completely cured in about 3-5 days with medicine from a doctor. Certain types of infections can be present even without any history of sexual contact. For all the self-conscious thoughts and the impact this has on your life, it's 100% worth it to go see a doctor , be embarassed for half an hour, and fix any medical problem that's bothering you. Doctors / gynecologists see women who have concerns Everyday. good luck!
Don't douche. It can cause more problems. Just try to keep as clean as you can by showering each day and changing clothes every morning and don't stay in damp underwear after you've exercised, etc. That should help!