I know you wrote about this somewhere else, but I don't want to hunt for that one! I feel your pain (literally). I have had recurrent pericarditis for the 11 years since my surgery, and I remember the severe pain of the earlier episodes as if it was yesterday. Mine would start under my collar bone and work its way to my shoulder, arm, back, neck, little toenail..... I alternated between Tylenol and Vicodin and still couldn't knock out the pain (oops! I have since learned that Vicodin contains Tylenol so am surprised I didn't shut down my kidneys!). They gave me a Medrol Dosepak, which helped, but as soon as I took the last pill, the pain came back. Finally, they left me on a low dose of Prednisone for months until the miracle drug Vioxx came out. OK, some people don't think it was a miracle drug, but it certainly was to me! I was tired of the side effects of Prednisone and had gained 35 pounds in 9 months and I wasn't even pregnant! I only gained 40 lbs. in my two pregnancies combined! Thankfully, the later episodes weren't nearly as bad and after Vioxx was removed from the market I could use Aleve for the milder cases and Mobic for the others. I actually can't remember the last episode, so maybe it's gone!
Anyway, I'm thinking good thoughts that you will be over this soon.