I've experienced this exact thing my whole life. My chest tenses up and heart flutters whenever I'm out in a social situation or even on the phone. My BP also goes up alot I notice. It's because of the negative reactions & abuse from people at a young age so it gave me ptsd & I expect to get humiliated even in adulthood...there are meds we can try I guess and meditation may help. But in the end if I do get a stroke or die of a heart attack I guess it's a way out of this bullshit handicap reality I was born into against my will.