Hi Eva -- I had a silent heart attack too !!! Thankfully it didn't do any permanent damage to the heart. But they've put me thru a battery of tests, and later this month I'll wear a Holter Monitor for 24 hours.
The added stress of chronic pain certainly doesn't help. If our doc's can at least keep us "relatively" comfortable (not pain-free) it would help matters immensely!

But so often they're reluctant to prescribe the adequate meds needed.
NO it is NOT in your head, for heavens sakes. You have plenty of proof of that.
I wish you the very best. You're in my prayers. Hugs, Lee