Hello and thank you for using HCM.I carefully read your question and I understand your concern.
I will try to explain you something and give you my opinion.
The pains that you explain resembles pericardial or pleuritic pains.They are pains that get higher in deep breaths, when a person lean forward.
Ischemic heart pains are not related whith position or inspiration.
Inflamation of pericardial layers or
pleura gives symtoms like yours.
If you previously had percicarditis it is still posible
to experience chest pains even after some weeks, during the resolving phase.
But to decide what we are dealling whith if I was your treating doctor I will recommend some examination like a cardiac echo to evaluate heart function and pericard, a fool blood analyze and inflamatory parameters like PCR to see for any active infection.
After this examination it is posible to understand something and how to deal with it.
Hope I was helpfull.
Bestregards,Dr.Ervina.