Hi Lee,
I am so sorry, I can totally relate to how you are feeling! Have you asked your doctor about a long acting pain med? It would stop that horrible cycle of clock watching and the ups and downs of relief. There are lots of things to try, like the patch which is changed every 2 days if your doctor knows a lot, 3 days if he hasnt used it much (the consensus on the board is that although the company that makes the patch claims 72 hours of coverage, it is more like 48) or he might want to try you on oxycontin or methadone.
I also recommend anti depressants for anyone in chronic pain, I know they helped me a lot, and if they dont help, you can always go off them.
In the mean time, you can always vent to us, I know it helps, I have done it myself.
Take care and let us know how you are doing.
Your Friend, Fabby