Bummer! If you're logged in on a browser tab can't you view your keys from Wallet/Keys & Permissions? If not, I'd pose the question in one of the Hive Discord channels...just be very careful as there might be scammers lurking. In the meantime I would create an alternate account just to be safe, if there are no options to recover the key you can transfer your tokens to that new alt account anyway.
RE: How can I gain access to my private key?