Has anyone read that it can go away with time. I think this is what I suffer from and the dr. didn't recommend meds for it. It apparently won't kill you(you just think your going to die-haha) but that I might have it forever or it may go away. Nobody knows. It was worse this past week, I started my period on Friday. I just have tightness, feel tired and of course my heart racing from my chest to the throat area. I am trying to pinpoint exactly when it happens so I can see if corolates with my hormone changes.It's the worst of my Mirena symptoms and the one that might never go away. 7 months post and alot of the other stuff is almost gone or pops up randomly. Mirena screwed all of us up!!!!!!