You can do it!

Lots of good advice already posted.
My 2 cents: Don't worry about what everyone else is doing, just follow what works for you and your own expectations for the race! It can seem like others are planning out (or mulling over or just generally spending time on) every detail of training. But there are others out here who are similar to you. Like me! I just don't post too often, I am almost always on my iphone and the tiny keyboard does not inspire me to post.
Anyway, I'm not training perfectly! I adjusted my expectations accordingly -- not planning on winning or PR-ing. I just want to get there in good shape, injury-free. I want to experience the race and get the medal!
First, I pulled a leg muscle which kept me from running for 4 full weeks through August. So I didn't run -- I was careful to let it heal, and now it's fine. BUT THEN, I fell very dramatically down a flight of stairs (not even any alcohol involved, just a classic wipeout). Luckily no breaks or sprains, but I got the worst, dark black bruises I've ever had. Including a huge one right on the thigh, which again slowed down the training.
Anyway, my point: even with all those setbacks... I'm still training! So keep at it! As long as you have the desire to continue, I think you are not behind at all.
My mini-update: I did 13 miles this weekend and felt GREAT. Following the Galloway plan for the first time (after doing Higdon 3 times), and I love it. I find I can negative-split my long runs easily (run the 2nd half faster than the first) and still have energy left at the end for the rest of my day. No post-run crash or soreness, either. I love it!!
Good luck to all as training progresses, I am enjoying reading about everyone's progress, etc.!