Heirlooms disappeared

Okay, this happened about maybe 20 mins ago, I logged out and when I logged back in my heirlooms disappeared. I checked the mail I recieved a mail and it was all there but I accidentally clicked return. HALP! I ****ed up. What do I do? *shame*

EDIT:
IGN: Minidoomer
Realm: Frostwolf

Either they will show up in the mail again later, or they're gone for good.

I just checked, they're back. Thanks for replying.