My Blockchain Payment Has Been Unconfirmed For 3 Days Now Please Help
You can use replace by fee to encourage miners to pick up your transaction.  This should be your next step.  See here for more info:

What is replace-by-fee?

Also, here is a how to:
https://freedomnode.com/blog/75/how-to-fix-slow-bitcoin-transactions-with-replace-by-fee

This site can help recommend what you should use for your fee so that you can set your expectations of when a transaction will be confirmed:
https://bitcoinfees.earn.com/
Basically, the more you pay with a fee, the faster it will be confirmed.  The less you pay, the slower it will be confirmed.