I had a similar situation with an Ethereum token and Meta Mask. Don't know what you're using for a wallet, but what worked for me was going into the MetaMask settings, then advanced, then reset. I'd make sure you jot down the transaction history or save the etherscan link so you can check to see if it works. Then there was another help topic on etherscan I found that is a little more complicated but seems to be the next step if the reset in MetaMask doesn't work.
https://info.etherscan.com/how-to-cancel-ethereum-pending-transactions/#replacing-cancel-pending-transactionsHope it helps.