pulltab,
I would get that same feeling along with all of this - outright panic. It was very scary and it was happening all of the time it seems. I went to my Dr. about 5 times, to the emergency room twice, a cardiologist to rule out heart issues and then an endocrinologist who tested me for all sorts of strange disorders that cause that adrenaline surge and flushing. Everyone kept saying it must be panic attacks and anxiety but it came out of nowhere and I was not under any more stress than usual. I finally went to my OBGYN who said this, along with some other issues I was having, were all signs of hormonal imnbalance and he put me on the pill. By my second month on the pill - no more rushes! I still can't believe that hormones can do this to you, but when I decided to stop the pill about a year ago, within 3 months I started having them again. Needless to say, I went back on the pill and it has not happenned since.
This may not be what is causing your "surges" but I felt it was worth posting about my situation in the hope that it might help someone out there who is going through this.
mary