Hi. My name is Chelsea and I'm 15. I've had this headache for a few months now. My mom took me to the dr for it, the dr did blood work and said im very low in vitamin D and take 5000 mg daily. The past 5 days ive been taking the vitamin D and my headaches have been getting alot worse..to the point where i cant stay at school. My headache goes away when i come home and lay down but then it starts hurting again. Does anyone know anything to help.