I cant feel my legs

Yesterday was my final longest run before my Marathon, and ended up doing a little over 20 miles. the run did not seem that tough, but when we finished, I could not feel my legs. Today, I am sore and feel like I got hit by a truck. I cant imagine what my legs will feel like come race day, but I sure will be excited to finish this race. This has been such an experience to this point. to push my body to this limit, running 30-40 miles per week sure takes a toll on your body. There is a lot of commitment that goes into training for somethign like this. One day, I plan on training for a full blown out Ironman.
From now until Nov 15th, I do want to continue working on my core, conditioning, and incorporate a lot of cross training. I am also planning on stepping up the YOGA. If I could change anything to this point, I would have lifted more weights and would have done more plyometrics. I have not performed any plyometrics for a long time.
In addition to my workouts, right now is when i will be changing my diet. I hope and plan to eat clean most days, with maybe one cheat day. The Alchol needs to reduced if not completely gone from my routine.
So much to do, and such a short period of time.. I hope that I will be ready.