Periostitis Caused By Overtraining?

Last April, while I was preparing for marathon, I felt pain during the workout and at the end of training, at the 3rd lower middle of the right tibia; just after the race, I underwent a rmn test which showed: “modest medullary edema 3rd lower tibia”, and since then I have avoided running, dedicating myself to mountain biking, in addition to getting a magnetotherapy device at home. Do I have to do a check up? Is a two-month stop enough? Could the picture be compatible with periostitis? Is it possible that the wrong shoes have favored this condition?