IF you are going to be late, it is really no skin off my nose. I just put you down on the "Defaulters List" and speak your name before breaking wind for the rest of my life.
The person you really need to face is your recipient. Go ahead and send them an update and gauge their level of comfort with the situation. If you have been living under a rock for the last decade and have never taken the time to read any of the prior threads on exchanges, you know most people will be happy to hear from you and ask you to strike a balance between time and doing your best work.
There are three days to ship, nearly 8 months of water under the bridge. The piper is winding down and must be paid.