It is hard to tell definitively from the information you communicated, but my clinical interpretation (diagnosis by internet) is that you are overtrained, or rather under rested. I'm not sure that it is a function of too much training volume (a la Claus) but rather your body not fully recovering before you induce a "peak" by tapering and racing. I've been training for 10 years know and make an effort to clearly delineate between seasons by taking 30 - 45 days off. I also listen to my mind and body every day. I've never trained a day in the past 5 years where I was not mentally engaged. If my mind or body was telling me "don't do it" I didn't. That takes discipline in and of itself. I think if you actually raced less and trained in cycles (a la 6 weeks prep base, 6 weeks base, 3 week build, 1 week peak, 2 week taper) you would see better result and improve your ability to recover. Unfortunately, once you are in the abyss, you have to shut it down, feed the beast, sleep and wait until your body says "this sucks, I'm fat, let's run". In the interim hit the yoga, piliates, movies, happy hour, etc.