i've been seeing streak of blood in the vaginal discharge. it comes out once-twice a day after i pee. my last period occured 7/25, and this spotting started on 8/6. at first i thought i was just ovulating, but now is 8/11 and it's still happening.

what do you think is the cause of this? im 23 and i never had sex. i'm currently on antibiotic for treating acne breakout (and i never had acne breakout previously).