I can relate. My heart has been racing recently.
Are you stressed about anything (aside from your symptoms)? I have been recently which is why I’ve been having these problems, I think. I feel like I made a breakthrough with what was stressing me out today and I have felt better all day.
If you can, try and reduce your stress any way that you can. I don’t think we’ve got the capacity to deal with it the way we did before.
Here’s an exercise for you too.
Set a timer on your phone for ten minutes. Sit on the floor cross legged and try and sit up really straight. Close your eyes and think only about your breathing. You’re only going to do it for ten minutes. If you think of something else, don’t worry about it, but as soon as you realise, think about your breathing again. Just ten minutes. It might help to calm you down. The key is the timer, until your phone beeps, keep going. Ten minutes might feel like forever, which is why you need the timer. Do not look at your phone until it beeps. Do not think about anything but the breathing until your phone beeps. Just the air going in and out, through your nose or your mouth.