I imagine it will feel like holding death in your hands. There's no rule that you need to take it because you have it and certainly not as soon as it arrives. Put it in a safe place, enjoy your kids and don't do anything until there's no doubt anymore.
I'm wanting mine to arrive so I can get those feelings dealt with and get on with it, either living or dying. I'm sure (for me) having everything I need will turn any grey area into black or white really quickly.