Hi. Im 19 years old. Since 15, I have these sudden pain 'shots' in my head that is very very painful. Most times it goes away immediately, but sometimes after a 'shot' it hurts all day. These happen around everywhere on the head. The ear area, the eyes also which makes those two parts hurt. Also, im always weak and tired. My back also has been hurting the past year. My hair falls like crazy and it doesnt grow back at the rate it should. My chest also hurts sometimes. I get pain 'shots' on my breasts and chest also. Also, once in a while, right where my last right rib ends, it hurts a lot. This year my periods delayed for 4 months. Before that it would always delay by 10-15 days.