I've never heard of orgasmic pleasure originating from the back, but maybe your heart chakra just cleared a blockage and the rush of energy is what you felt.
If you're still feeling something physical, I'd suggest a chiropractor. Shoulder blade pain is usually associated with high fat foods and acidity. It can be easily fixed by a chiropractor, but I would suggest some dietary changes if the pain persists.
There is probably a spiritual component but that can still manifest physically as well, so I would suggest getting a chiropractic adjustment, so this new energy can flow unimpeded.
If you're still feeling something physical, I'd suggest a chiropractor. Shoulder blade pain is usually associated with high fat foods and acidity. It can be easily fixed by a chiropractor, but I would suggest some dietary changes if the pain persists.
There is probably a spiritual component but that can still manifest physically as well, so I would suggest getting a chiropractic adjustment, so this new energy can flow unimpeded.