12 months ago i was rushed to hospital for having a pre diagnosed diabetes , i was in hospital for over a week and my blood sugar levels was up over 18 . points for a day or so. but the interesting thing that happen, i had a headache before going in to hospital and still had it when i left, but they gave me insulin to bring the blood level down quicker from say above 10 back to 4-5 points and for like 21 hours after they gave me insulin my headache was completely gone- after such time frame my headache come back and i have had headaches for the last 12 months or so everyday. question is i have what did the insulin do ? if i dont have diabetes