Im 19 years old. For the past two days I've had a migraine that has come up around 6 pm. It lasts about 2 hours. I've taken ibuprofen. But it had no affect on it. Tonight I did get skittles nauseous and light headed. I'm a smoker and I smoked about 3 cigarettes tonight and at the end of the cigarette I have ended up gagging myself. Not much as gave me an appetite it makes me feel like I'm going to get sick if I do eat it. I had my first deposit shot two months ago. However I did take the deposit a year ago and just had a six month break period from it. During that time I was on the pill. My boyfriend and I had unprotected sex about a week ago. What could it be?