Hi dr, i was on my periods on the 13th of this month it was heavy and unusually painful. it lasted 5 days. but now i am experience slight bleeding?

Menstrual cycle: You do not state if you are sexually active, or of the period on the 13th was "late". If active you could have been pregnant and miscarried. A normal menstrual cycle counted from the first day of one period to the first day of the next varies a bit. Cycles can be between 21 to 35 days with 28 days considered "average". Flow may last 2 to 7 days. Hormone fluctuations influence the cycle as well.