Had a roommate pass one many years ago. I thought the poor bastard was going to die on me. Scared the ever-living hell outta me. He was conscious enough to demand that I not call an ambulance because he had no insurance. Evidently, he'd had them before and knew what was going on. I've never seen a human being suffer that much. Three days of agony.
Afterward, he told me that a doctor years earlier had told him that it's the closest a man will ever get to knowing the pain of childbirth. Scary crap. And yeah, once you've had 'em, you'll be prone to getting them again.
Hope you feel better soon, man. I don't envy you in the least.
--Wag--