You do know we'll still be trading with the EU right? It's not like because we left they won't talk to us, it's just we need to get things cleared up first, then we can pursue our own endeavours, if our economy worsens it'll force us to invest in industry again, the one that was ruined when we joined the EU, if we can at least start selling stuff again (Other than pencils and chairs) we can improve, it hasn't been that long and it's a big step for us.
But just saying, you should be more worried about whats on your side, you're screwed either way, on one side you've got Trump...on the other you have Hilary. Neither of them seem any good, sure they have their pros, but the cons are scary, for everyone.