Dang, that can be tough when you need it. I remember having surgery for my leg and then needing oxycodone and acetaminophen every few hours. I just dealt with the pain that still persisted even with that dosage. It was tough but I was up for it, because I had to, on account of wanting to keep myself from being dependent on it, and the fact that they said it could damage my liver or something if I took too much. I can hardly imagine what it would have been like to go without it for a few days and nights. Definitely made me feel able to handle more pain though, for those hours before the surgery when I didn't have anything, and when the drugs would wear off in between taking them.
Take care!