Am I making a fatal mistake?

Okay running friends...if you've been following along at home, you know that I registered for the Goofy Challenge just a few weeks ago at the Wine & Dine Half.  EEK!  Not how I should have done it.  Add to it the fact that I got sick after the Vegas RnR Half and was out for almost two weeks and now I'm only two week until race day and looking at a 20-miler.  Am I making a fatal mistake?  I'm running a huge distance almost a full week later than what I'd normally do.  I should be in taper mode.  Instead, I'm squeaking in a 10/20 weekend.  Am I nuts?

I'm trying to balance proper training and smart tapering.  What are your thoughts?  Should I skip the 20-miler?  Should I do anything extra to help speed up recovery?  I'm starting to panic!  #WhatWasIThinking