5 years ago I had similar sensations but i put it down to fibromyalgia since it often affects my rib area. The GERD was worse. I ignored it. Went to bed even though pressure was terrible. 2 weeks later I got a stress test. It was a small heart attack minor but affects to bottom of the heart wall as weakness pumping up.
So my answer is get checked. They might have stopped the damage on me instead of the progression. Im on nitroglycerin and keep it with me always. Take a baby aspirin if u have them and go get checked out.

I ended up in ER a few times because of this, but always after a day there got sent back home. They were big pain flares
Despite this
Doc said not to take a chance

Since then I’m followed by a heart specialist, run the tests every year to keep abreast of the “situation “ as there is heart disease in my family. So far so good. Keeps me out of ER .
Now with bronchiectasis as a new lung development it’s even more tricky but same applies- see the doc, do due diligence. Stay informed

I was rushed to hospital twice, one of those times I knew I was having a heart attack. I stayed over night for observation my heart rate was fast but I was diagnosed with tachycardia years ago. FM is a strange thing at least they now know it’s inflammation in various parts of the brain.
Hugs!!!

Agree with you 100% plus @A MyFibroTeam Member
Don't take chances

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A MyFibro...

Can't yo start out with your primary doctor? Then take it from there, we all seem to suffer with similar things hard to know if the fibro is causing it or not. I have a lot of things wrong with me have suffered few things you have mentioned, but some are not caused by the fibro. Good luck & keep us posted. Sending caring prayers with good vibes you feel better.