I noted that many people are talking about unconfirmed transactions these days, and i had the same issue, i found a solution here :
http://josephyap.me/blog/2016/03/15/how-to-rebroadcast-an-unconfirmed-bitcoin-transaction/You won't have to wait for VIAbtc to include your TX in one of their blocks, but you will "rebroadcast" the TX.
You must know that a TX is "forgoten" by the blockchain after 3 days if she is not confirmed, so when you get to that point, simply rebroadcast it as described in the link.
Hope that helps
