I'm sorry your pain is so severe! I've never had what I'd call "excruciating" pain with mine, so I am fortunate. It gets pretty uncomfortable, but the pain medication keeps it pretty much under control. I can really feel it coming on as the medicine wears off though. Are you taking the maximum dose that is allowed? I would not take more than is prescribed, but this early on, don't be afraid to take it by the clock and don't let it wear off. That's what it's for. This is a big surgery, and it hurts, so don't be afraid to take the medication.