YOu can't make it heal faster. You need to take the time that the Doctor ordered and take it easy. My ldest no longer does walkovers, she has lower back problems and they just hurt too much. SO now she works on strengthening and keeping her muscles not too tight. She still competes, fortunately in CAnada she can construct her routines without them.
YOu only get one back for your whole life, so you really have to take care of it now. Sorry I have no better advice.