Karen,
I agree with Marlee & Diane-sometimes when I get low blood sugar, I get that cold, sweaty, clammy feeling. But, I also get it with these new "migraines" I've been having. Yesterday, they got so bad I dragged myself to Urgent Care-only to have them tell me that they think I was having migraines (Oh yeah, and they weren't giving me any narcotics LOL). DUH! But, at least I got something for the nausea, and I'm finally feeling better after 3 days.
I think my original point was that I also get that cold, sweaty feeling with really bad pain. But, since we all seem to suffer from really bad pain, I'd make sure your blood sugar isn't too low. This sounds like a classic case of hypoglycemia (you spelled it right, Diane).