I made a BTC transaction a few days ago, where I set the fee amount way too low. It seemed that the transaction was lost in limbo.
I did some research, and apparently you are able to double spend your btc, if the transaction hasn't been confirmed yet.
So I imported my wallet into Bitcoin Core, where the unconfirmed transaction wasn't shown, and I was able to initiate another transaction with higher fees.
Now it seems that Blockchain.info doesn't show my transaction, and pushing it manually results in a mempool conflict. The same happened with this service: https://coinb.in/#broadcast.
But I was able to push the transaction through https://localbitcoinschain.com/. Now the transaction ID is unconfirmed on localbitcoinschain, but can't be found anywhere else (Blockchain.info, coinb.in).
Can this second transaction be approved, or is it impossible, if its only recognized by localbitcoinschain.com? How should I proceed? At this rate, my transaction seems to be lost for a long time.