This is what I face every month :/ 

Menstrual Cramps 
Grr

Menstrual cramps of some degree affect more than an estimated 50% of women, and among these, up to 15% would describe their menstrual cramps as severe. Surveys of adolescent girls show that over 90% of girls report having menstrual cramps.

Seriously,this is killing me. 
Why girls must suffer from this.
NOT FAIR !