I have a pretty high pain threshold too, and the pain drugs made me dizzy and nauseous, so I didn't take them after the first day. I had a nice big incision too!
Walking is your friend. (The pain drugs made me too dizzy to walk, so that was another good thing about not using them.) The only thing to watch for is that you don't get yourself out too far and then over-do it trying to get back. In the house it's usually all right because there's always somewhere to sit down for a few minutes.
2009 Trek 7.2FX WSD, brooks Champion Flyer S, commuter bike