https://bitcointalksearch.org/topic/faq-all-about-unconfirmed-0-confirmation-transaction-fee-read-before-posting-232979
Wait. If you don't want to, here's how to double-spend.
https://bitcointalksearch.org/topic/guidedouble-spending-an-unconfirmed-transaction-made-with-a-third-party-client-231309
IIRC, there was also something to increase the fee of an unconfirmed transaction ( can anybody link that? )
Opt-in RBF. You can replace an unconfirmed transaction with another transaction spending the same input if the original unconfirmed transaction was flagged to be replaceable. Not in OP's case.Wait. If you don't want to, here's how to double-spend.
https://bitcointalksearch.org/topic/guidedouble-spending-an-unconfirmed-transaction-made-with-a-third-party-client-231309
IIRC, there was also something to increase the fee of an unconfirmed transaction ( can anybody link that? )
CPFP. OP can choose to spend the output with a high transaction fee. If the miners applies the CPFP patch, miners would want to mine the entire transaction chain and get all the fees. However, the problem is that a small percentage of miners have this patch as of now.
I had same situation, so what I did was sending another transaction to the same address, it was small amount but with fee setup to 1$, after that both get confirmed in about 2min.
It doesn't help. 
