Transaction Pending Not on Etherscan?

Hello,
I sent 0 Ether to my account to change the Nonce and increase the gas price to help cancel other pending transactions that would not execute as the gas price was too low. I’ve tried to cancel this transaction by increasing the gas price, it is the last pending transaction with a Nonce of 18 that I cannot clear. It is also Not showing up on Etherscan for some reason. Wondering if trying to cancel a transaction sending 0 Ether to your account is possible ?