This Will Be The Third Morning I Noticed It. But

This will be the third morning I noticed it. But both side of my labia closest to the clit, burns when I pee. I can wash with soap and water, no pain or discomfort when no pressure applied, no discharge or bumps. Just redness and a raw feeling. Slight burn when masturbating, because of applied pressure. No history of sti and have been with monogamous partner for one year. Whatcould it be? Thank you!