This question already has an answer here:
Hi I recently tried to make a transaction to a coinbase btc wallet from my bitcoin qt 4.8.3 node/wallet. In a hurry I didn't add a transaction fee. So the fee is zero. I see on my end the transaction is unconfirmed. Blockchain Explorer does not recognize the transaction ID either. I assume the block is waiting in the mempool and no miner wants to touch it. I've contacted coinbase's customer support and don't have too much faith they even understand what is going on (sry for the negativity, just keeping it real). It has been 6 days so far. Any suggestions? I would still like the transaction to go through. Maybe a "pay for parent protocol". But if it doesn't could someone walk me through the process of retrieving my transaction/block back. There is a lot of support out their on the internet but not that much for a bitcoin qt 4.8.3 node/wallet. Any help would be appreciated. Thanks.