First: make a new backup of your wallet.dat!
Then: check your addresses on for instance Blockchair.com to see what the current balance is.

What fee did you use for your transaction? And what "tiny" amount did you send: if it was less than 0.00000546 BTC, it's under the dust limit.

A warning: ignore all "help" you get offered through PM, people have been scammed that way.