How quickly does peroneal tendonitis heal?

I am an active runner. Before my foot pain (peroneal tendonitis of course), i was putting in around 45-50 miles. The reason is because it was a very rapid increase in milage and i was wearing extremely worn out shoes. If i rest, take ibuprofen, get new shoes, and ice the area, how soon will i be in good shape to run again. My goal is this saturday (2 days from today), but does that sound too ambitious? And please don't say that "the healing varies upon the person". If anyone has past experience, please give me an estimate and note that i am a 16 year old boy.