If you have the habit of using a tampon, stop it and go for using a pad instead so that any discharge can be clearly seen and presented to a clinician for observation. The discharge could be anything from a retained tampon to an early altered discharge that one has before a period ensues to some urinary infection. Please see a specialist for a local exam and also get a urinalysis
for further help. Please maintain genital hygiene. Hope your query has been clarified. Wish you good health.