I am currently on the Merina IUD and have developed sinus tachycardia. I am now starting to question the idea of a severe hormonal imbalance and am getting the thing removed in another couple of days. I just red this morning that red wine can get the rate up because of the histamine in it. Guess I have to give that one up and see if it helps.
I wish I had answers. All I can say is that I know what it feels like. I'm calm before it starts, but awfully unsettled afterwards. I'm about to turn 35, so we're close to the same age.