I've had this on and off for a while. The last time I had it, it lasted for about three months (worst three months ever; I constantly worried I was having a heart attack). I find that warm compresses can make it at least bearable, and my doctor told me to try and avoid heavy lifting, which at least kept it from getting worse (I had to move during that period, so I discovered that heavy lifting really does make it worse).

Anyway, hopefully you'll have a much shorter experience like previous posters, but these are just some things to keep in mind.