Still new at this so I wanted some more experienced opinions . . .

Yesterday, I went the furthest that I ever have at 21.4 miles. My last ride before this one was 5 days beforehand at 14 miles. Yeay for me, right? Well, it wasn't exactly a 'good' ride. On my two miles even before I got to the trail I already knew I was in trouble. I just didn't seem to have the energy that I have had in past rides. I typically ride later in the day after I've had a meal or two digested in me. I don't like to do any sort of cardio with a whole lot of food in my stomach since I'm one of those who will lose their meal if I've exerted myself a lot. I had an apple before hitting the road and a cereal bar while on the road but maybe I still didn't have enough fuel? I also had water and Gatorade on hand.

Secondly, after the ride I had a headache for a good remainder of the day. Was it possible that despite my efforts I was still dehydrated?

Thirdly, as I mentioned elsewhere on the board, I am/was recovering from some really bad allergies from last week. Is it possible that I got back on the saddle too soon? Should I have given myself more time to recuperate?

Appreciate any responses.