Love my Vibrams and fortunately I never have had any issues; must be 8 years of combat boots. You have to work your way into them and a 20 mile hike is pretty extreme. Take your time and keep breaking them in. My advice on the toe situation would be to wrap those puppies up in some duct tape and keep rolling. I know it sounds weird but I've been on 25 mile ruck marches and I know how hamburger feet look and feel. Not fun but a little Duct tape will go a long way.
Today is a new day. You will get out of it just what you put into it. If you have made mistakes, there is always another chance for you. And supposing you have tried and failed again and again, you may have a fresh start any moment you choose, for this thing we call 'Failure' is not the falling down, but the staying down.