There was about 1/8th of an inch of stretch on the chain before I changed it. I went ahead and also put on a new cassette a day or two later and the feeling is still there. It's weird and only happens when I am going uphill or getting my cadence up to tempo. It is in no specific gear combination but if I am going up hill and it happens, I downshift and it goes away for a few pedal strokes and then sometimes starts up again. It's like a buzzing in my toes. I checked my cleats and they are tight. My seatpost is tight. The front chainrings looks nothing like the picture tallrider posted. The front chainrings looks pretty good.
I also carry our son on the rear baby seat and front panniers full of groceries and other items and it is much much more prominent with the extra weight. When I am by myself I can hardly feel it. I checked all the bolts on all the racks for tightness. I don't think the crankset is loose, but if it was how would I know. I have grabbed both cranks and pulled on them for play and there is none.