I just got my period, but is it very bright red

Vaginal bleeding: Any new, abnormal, or unexplained vaginal bleeding requires professional evaluation. If this is definitely a change, see your doctor, especially if the amount of blood is more than usual. If the amount is normal, your period lasts the usual no. of days, and you have no other symptoms (vaginal discharge, pain, etc), probably nothing to worry about -- but call the doc's office if any doubt remains.