Fent withdrawals are nasty but it's very short acting so the withdrawals don't last as long as heroin. After 10 days you should be well past the acute stages of withdrawal, for both fent and H, so whilst feeling fatigued is normal after withdrawal the puking should have stopped by now. It could be that the whole process has left you run down and picked a bug or something. I think the most important thing is to keep hydrated so drink plenty of water.
With regards to your percs I don't think it's a good idea to keep them around if you're serious about quitting. Taking them at this stage is gonna set you back a bit, it's gonna draw the whole process out. But going 10 days when you've oxy at home shows you've strong willpower, I couldn't have done that. Ditch the painkillers and stick with it, good luck.