What Could Brown Discharge From Clitoris After Masturbation Indicate?

hi. i'm 30 yrs old single female. no children. im 5ft and 55lbs. i have masturbated by rubbing my clit with a hand lotion. a day after that, there was a brown discharge from my clit mixed with dry blood. 2 days after that it disappeared. but when i masturbated again and did not use the lotion, the same discharge came out from my clit again. i am worried. what is this kind of infection?