I truly feel like I wrote this post myself. I suffered from this for months, and every time it happened I freaked out which of course caused more anxiety.
I called the ambulance and went the ER, they did the usual tests, not a heart attack, and sent me on my way, so I went to my GP, and she wanted to give me piece of mind, so I got a full cardiac workout (running on the treadmill, cardiac echo etc, all good.
So next plan was a mental health plan to help with my anxiety, and my psychologist was great, and I use her words each time I get a little pain and freak out "I may not feel OK, but I'm OK" My anxiety was health related as well as noise anxiety.
My GP was a blessing, she work with me to eliminate those concerns and then helped with the referrals.
I would be in bed, and get "that pain" and then tingling all over my chest, and panic would start. So I would start saying my psychologist's words and it helped me calm down. It doesn't solve the problem, but it helped me get to a point where panic was overpowering me.
I was useless at meditation, it just didn't work for me specifically, so to help me during the day, I would make time to spend outside, even just watering the garden, anything to get me outside, as I have a job that requires me at my computer all day.
I still have a long way to go, but I'm getting there, so all the best to you.
PS: I also get a different pillow and a thick memory foam mattress topper as sleeping was causing issues and some of the pain, I was pinching a nerve and causing me to wriggle ALL night.