I still have something similar now (10 months post-removal), especially starting day 14 or so of my cycle. To me, it feels like vibrating and when I lie down, I feel my heart beating fast and I sometimes also feel some anxiety that makes me feel that I am having trouble breathing. I know that I am not because when I do deep breathing thru my belly it will go away. It is more than likely a hormonal thing due once again to the Evil Mirena !!!!