I was going to suggest you find your way over to the (existing) 'Bone mets, please join in' thread, but I see you already have.
It's always a huge shock when you are told you have mets and it does take time to adjust and get your head around it. Many of us have been living with mets for many years (I've just clocked up my 10 year anniversary!) so we may have forgotten exactly how it feels at the beginning but definitely will all know what it's like. Give yourself, and your family, time to adjust. There's no reason you can't continue to live as you have done before you knew. The times I feel I am ill is from the side effects of treatment such as chemo. Walking etc is good for the mind and the body so there's no reason to stop doing it.
As you've started a new thread it may get a bit left behind as the other main Bone Mets thread tends to dominate - also you end up posting the same thing twice which is a faff! Maybe continue on the main thread and you can then get lots of advice from ladies who are living through this as well.