..Badheart...I too have had a massive HA..and also suffer from pleurisy and Angina....so I can see the worry you may have. And your Dr!...WOW!....not to ever see anyone with bad pleursiy? I have had it so bad we called an ambulance as well...thought I was having a HA! In fact I almost passed out at the hospital from it.
I do keep Nitro on hand...both Spray and Pills...and have used them before just incase. I also get cramping in my chest while laying in bed...but can make it go away by moving my position. Also...I get a extreemly sharp stabing pain in my side as well...and hits me so hard it makes me yell out....won't tell you what I yell! LOL...but it can sure drop me to my knees very quickly.
Lets hope they get things figured out for you soon...as I understand the worry, especially if you have had several HA's in the past.
SE