Hi everyone,
I've been into bitcoin since 2013 when I bought some for around $500. I had another (now forgotten) username here and I used to read this site a lot, but my computer crashed in 2014. Right before it became unusable, I was able to save the wallet file from Bitcoin QT to a usb. After that, I just kept the wallet file on the usb and never again downloaded the client because I didn't feel like taking up a bunch of space on my new hard drive. Besides, around that time in 2014, bitcoin had crashed from its ATH, so I didn't have much incentive to access my bitcoins again.
So I sort of fell ass-backwards into hodling to this day. It was only this month that I decided to redownload the Bitcoin Core client, replace the wallet.dat file with my old one, and sync the blockchain. It took almost 2 weeks. During that time, I even bought a little more bitcoin and a Ledger Nano S. Finally, after the blockchain finished downloading, I sent some bitcoins to another wallet from Bitcoin Core. Even though I've been holding for a long time, I am still a newbie to the fee structure in the wake of a clogged mempool. I sent three transactions to GDAX, but the transactions stayed in the mempool for a few days with 0 confirmations. I double-checked my fees and realized they weren't high enough. So I came to this site and researched how to clear/abandon the transactions. That seemed to work, and the transactions now list as abandoned and not in the mempool in my Bitcoin Core transaction list. Right after that, I sent one transaction to GDAX again, but this time with a higher fee (about $100, which is what Bitcoin Core recommended for confirmation within 4 hours). Yet, the transaction has been stuck for a whole day and I'm worried it will stay that way because of the previous transactions.
Two problems: First, the new transaction says it's in the mempool, but it never said it had broadcast to nodes. Second, when I try to push/rebroadcast the transaction from blockchain.info, I get the following message: "Validation Error: BitcoindException(super=com.neemre.btcdcli4j.core.BitcoindException: Error #-26: 18: txn-mempool-conflict, code=-26)"
After a bit of research, it seems that this means the mempool still thinks my previous transactions are waiting for confirmations, even though my client side says they've been abandoned and are not in the mempool. Is anyone able to help me figure out how to get this transaction through? I need to take some profits off the table for my family before the new year and I can't believe it's such a hassle. I just remembered how fast (and relatively free) it was in 2013 to send these bitcoins around. I realize my lack of expertise is playing a major role here, but can anyone give me some advice on what to do?
The transaction ID is 4844ad44b267d91602e94fa3f0ab4d1ad285b49b557bd1685fa2520c8a8fde55, but of course that's not even showing up in the block explorer.
Thanks so much for any time you can take for a response!
EDIT FOR ADDITIONAL CLARITY: Both transactions (the one I abandoned and the new one from yesterday) came from three of my addresses:
https://blockchain.info/address/1MsPyunKmQz2GTqf8YHXFTrKAo6RgYiQM1https://blockchain.info/address/1CfVGyz3kjMVMqYG3JXHbt3mCZY7s4m9Phttps://blockchain.info/address/17ghwMzzSpbLpGxWdAgzDdzGWAwbZMJgxW