Please, stay calm and don't panic. Don't panic, no panic, I mean no panic...
Sit down, and listen:
Ok, Etherdelta was hacked, hackers changed DNS server of it and were transferring traffic to the fake website, most of the old accounts should be safe but I'll advise transferring funds to own hardware valet...
Anyway, your private valet keys as I understand is saved in your browser's cache so funds can't be stolen from it. the only problem is that during that time whoever used that website and deposited or may be withdrawn it could go to the wrong address. I'm not expert, it's my own opinion, you should research on your own.
Now you can panic!
That's what I was doing before accessing my wallet on myetherwallet.
More info here:
https://twitter.com/etherdeltaI have all funds in my wallet so I'm calm but anyways, it's a bad news.