@healthybon Hang in there. The fears may not go away instantaneously, but the more you seek understanding of what is going on in your body, and the more you practice some of the things you mentioned (deep breathing, exercise, meditation), along with some resources you haven't yet tried, the more your fear response will relax. I have to confess that it took me a few years to not panic about what happens in my body that I can't control. (And I can still get rattled!) It's great that you're asking what other people in your situation do to combat panic and fear. Look into their suggestions. You will undoubtedly find some things that will eventually allow you to make peace with this new reality.