Darvocet is one of the most mild of pain medicines yet it can be very effective for pain management when taken along with following the plan of care instructions of your doctor.
With that said, if you plan on continuing taking medicine without surgery you will seriously need to be refered to a pain management doctor. They are the only doctors that are truly qualified to manage your pain and actually make a plan of care to keep you out of pain at least enough to allow you to be partially normal.
If you are not having success with the darvocet as prescribed, do not increase your doseage because it contains tylenol and it will do some serious damage that is unrepariable! If you need more of the medicine, you could ask the doc for darvon, it is only the active medicine with no fillers or apap.