Chloe,
Have you tried Ativan? My pulse has been so rapid before I've gone to the ER where they've tested me for everything and sent me home hours later only to tell me that it was stress-related and to seek counselling. Ativan works quickly to at least temper the physical symptoms. The generalized terror still remains, but the body doesn't seem to respond as vehemently.
Good Luck and Best Wishes,
Nicole
