the first day of my last menstruation was aug. 4 2016. Until, the 8 of aug. 2016. I was suppose to receive it on the 1 of sept. 2016. On the 16 of sept., i was going to be 15 days late. On the 17 ,i finally appeard but it only lasted two days. i haven't been stressed. its the 19 of Sept. 2016., and im not on it. im very confused. but during those 15 days , i had back pain.
im 18 years old.