When it comes to your health and wellbeing, first and foremost you should listen to the medical experts. Also, because there are so many variables here, I will only be able to give general guidelines. You cannot and should not think of anything I say here to be specific advice to you personally.
That being said, my experience of helping people return from injury or surgery has taught me a thing or two. And I actually snapped my achilles tendon at the start of July, so am having some first hand experience of this!