havabrew
Whatever you do don't give up!
Like you, I've just started running / walking. I've found my fitness level come on leaps and bounds recently but after the first week or so it would have been really easy to just knock it on the head.
There's a barrier after your start running/walking to get through that hits you after about a week or two of doing it (in my case). Whereby you don't see any benefits, you are demotivated and you just think that it's "not for you"... but trust me, get through that and you'll suddenly start seeing really encouraging results and you'll be away...
Obviously, as has already been mentioned, listen to your body and listen to your physio. But even if your orders are to rest I would still put my kit on as you would have done and, at the very least, just walk out of your door and then back in (maybe try and just walk around the block). This will keep you in the routine of getting your stuff on and at least going outdoors... this, for me, is always the hardest bit.
Good luck with it mate, hope to see you get over this hurdle and get back on track
