The stockings are to prevent clots, just like the injections. You need to wear them in hospital because you are far less mobile. If you are up and about as usual at home (you don't have to be walking miles or running marathons) and you are following medical advice you have been given you should be fine. It is a scary time being home after surgery, your imagination can run riot. Focus on healing, keep moving and you will be recovered in no time x