im 19 years old and I've also had an unusually long period lasting for about 2 months every two weeks

it cam heavy...i have never had it like this, i go through a pad every hour! i am tired ALOT unusual for me, sleepy, weak and have been eating alot of healthy food to try and keep alert...yet the dr said there was nothing wrong wtih me....my clots are so big at a point i feel like i am pasing grapes