Hi LisaSD hope all is well. I too have the same condition. Is your heart rate issue resolved?
Ooooh, the medhelp censor is very clever and has figured out that the word dot followed by the word com signals a link to a forbidden thing. So here's another approach to getting to the deep, dark, secret link:
Just type this into your google search box and the doctor's lounge commentary should be the first thing on the page that comes up:
hematology/forums/backup/topic-12996.html
Well, obviously the people at the ER were looking for a clot somewhere, but although your d-dimer level was slightly elevated, it wasn't red-hot, and since nothing showed up on chest scans and the d-dimer level is falling as well, you probably are in the clear in that department.
Elevated d-dimer levels can be caused by a lot of things, even a recent infection. Take a look at this link, which I'm going to have to put in a form that medhelp will not censor. Instead of copying and pasting the URL, just do the first four words as the standard one word address with a period before the 'com': doctors lounge *******/hematology/forums/backup/topic-12996.html
As to the irregular beats that the monitor isn't catching, you should call your doc about that. If the machine is malfunctioning, what good does it do to wear it? Another possibility is anxiety coupled with a hypersensitivity to normal body sensations. A lot of us at this forum suffer from that, and it sounds as though you might also have a touch of it.
Breathing irregularities, including the impulse to take sharp, deep breaths, are often related to anxiety and panic.