Being fit

I'm feeling pretty fit today. I placed 2nd overall female at my last triathlon. I bested my last years time. I've been training hard for three months for what's to come on July 15th. Then, what's wrong with me? My mind doesn't feel fit. This is different that the nervousness I was feeling for my BQ marathon. Life gets in the way of what I want to do and makes my head dizzy.