The past couple of months, my period starts off light with brown vaginal discharge then regulates. i am a virgin and worried. what does this mean?

Sounds normal!: During periods, we shed the inner lining of the uterus -- the endometrium -- if we're not pregnant. Sometimes that shed layer may not come out for a day or two, & can turn brown. So can be normal; why it changed, i can't say. If you are having low pelvic pain, the discharge is unusually foul smelling, or your have a fever, though, it could be an infection -- then see an ob/gyn! good luck!