From my own experiences with subdrop it sounds to me like Warbaby said. Not only did you experience the drop but seemed to have some kind of bug that came about during the same time. Then again subdrop is different for different folks. It could be that your body got taken so high that the only way it knew how to recover is to lay you up for 2 days. Being as it was your first time I wouldn't worry. The first time, as with most anything, is the hardest. ~smiles~