Over the past two weeks, I have been experiencing flu like symptoms. I have been to the doctor twice, each time they sent me home insisting that it was only seasonal allergies. In the past few days, I have experienced pretty severe back pain, light headedness, fatigue, etc. I am now spotting, which has never happened before(although I am sixteen) and I am experiencing period like cramps, and feel very feverish. It is impossible that I am pregnant... What could it be?