Hi, this is a pretty old thread, but now that it's been over a year, I still get this once in a while. It seems to come and go. It doesn't worry me so much any more, so the panic that goes with it has gone away mosty. Still get a little adrenaline surge with it sometimes though. I still am not quite sure what it is. Interesting that you have the history of stomach problems with it. Did you also have issues with Mirena?