It was just the reaction to the medicines; I was pumped full of sedatives during the day, and that was groovy - but when those wore off, and my body realized it had a high dose of steroids pumped into its spinal column, my hear was racing, I was panic-y, an unable to sleep. A rare occurance; but there were those old nights where I couldn't sleep either. I generally sleep well. Last night was a mess. I woke up feeling like crap, but it's mid-day now and I feel much better.
Bt