I had an Aha! moment Thursday night when I realized what was going on... I was in a detox! I hadn't been eating on plan consistently the past few weeks but Sunday, Monday, Tuesday I ate out. Tuesday was on plan but it was still not food I cooked. Tuesday I worked out (outside), then Wednesday I ate on plan. And my body decided it was a good time for a detox day :-P
Once I realized that's what my "sickness" was, the way I was feeling made perfect sense!
It must've helped. The next day when I worked out is when I really pushed myself during those jogs and did fine with them :-)