Costochondritis

New to this forum. Short question would be- does anyone with costo. have mild tingling in left arm?

It's the main symptom that gives me panic attacks thinking it's my heart :(

I've had CFS for 20 years and chest pain for 6 months+ although used to have it mildly with colds. Have had heaps of test to discount heart- ECG, triponin blood test (I think that's what it's called), stress test...

I'm pretty sure it resulted from coaching/demonstrating discus for the first time in YEARS- without warming up (clever!). I also have an old left shoulder injury from diving in touch football and am wondering if this is contributing.

I am so over it and just wish I could have some kind of proof of injury to help me stop panicking about my heart :(

Thanks for letting me share.

P.S. Pain mainly in sternum, radiating across ribs- keep changing where it is but when bad it hurts to breathe. More recently cramping in my back and pain up my neck. Not much fun, especially when I've finally just gone back to work after years and years.