AH! I FEEL LIKE HARRY POTTER!!!!!!!?

Okay is this normal I have very thick hair and have a relatively good diet (of greasy fat double fried foods and then busting my *** 3 hours a day on exercise) So anyways! My hair grew 3/4 of an inch... In 2 weeks!!!!! I AM LIKE BUGGING OUT!! I measure it by stick a piece of tap to my part (down the middle) and then to the end of my hair and measure that daily. I do this because my Mom cut my hair short and I hated it so I want to know how long it will be by school. Which is in 2 months is their any reasonable explanation!?!?! I mean I am like STRICT on how I measure it their is no way it's a miss calculation?