Can’t send any transactions, please help!

So I'm a bit of a goof, screwed up and sent two transactions for the near same amount, and didn't realize I didn't have enough ETH to pay for both transactions. I have attempted to cancel the transaction by using MyEtherWallet and using the same Nonce (270), by sending 0 ETH to the same contract, which promptly disappeared but still somehow shows up in my Metamask? Here is my Etherscan, and the specific transaction that is stuck due to insufficient funds. Any and all help is appreciated, I'm seriously at a lose and can't buy any more ETH for a hot minute

Submitted September 05, 2018 at 03:15PM }
via reddit