overtraining

You are likely just overreached - not overtrained.

Take a serious down week. It will freshen you up a ton and will put life back in your legs. If you've got 4 weeks go down week, 2 normal weeks, 1 easy week/taper.

For the down week a day off, run low mileage for a couple days, do a half workout, take a day off and then finish off the week with some more low mileage runs. You're in shape but you need to start feeling good. Have the balls to back off. I have been completely spent before after 3 weekends of disasters I took a huge down week (ran very little each day) and then had a pr the week after. I felt like a new man.