Hi and welcome~
You're wise to be concerned. Addiction is no picnic!! But,personally,I think you're fine.
You seem aware of the pitfalls and can go days without anything. If you're able to, take Motrin,try 800mgs. between each dose of Percocet. You can take it up to 3x per day.
Also,try other things to cut down on your foot pain like hot soaks several times a day.
And good shoes! Very important... The thing is,you don't want the Percocet use to get away from you so try to use it minimally. There is also a "pain management" forum you might want to check out. But,you are always welcome here.
Vicki