I do. I have previous injuries and orthotics but it's strange...there are days when it seems like everything should go wrong (I get up late, the weather is bad) and I have a fantastic run. There are days when it should be perfect and it isn't. My spots of pain roam around so it's difficult to tell me PT what hurts because one day it'll be a spot in my ankle, another day it will be something else.

Maybe you're overtraining?

I can relate though. Today I did an increased distance and it felt surprisingly good. Today I did a short distance and it was a struggle. That's what made me think of overtraining or not enough recovery time. Maybe keep a training log?