Carla, you were spot on regarding the socks!

The coarse yarns of my former crew socks were like walking on rope! What a relief! With no diabetes, heel spurs, and having had these shoes professionally fit a little over 2 months ago, I figured it was a freaky feeling of foot fatigue.
This is the one suggestion I didn't take from folks who've been walking for years - "beware of cotton socks." I didn't think it mattered until I had worked up to walking over 4 miles daily and became really disheartened after mile #2.
Thanks again, Carla. Switching socks has made a big difference!
Thanks everyone for your suggestions - much appreciated.
Take care,
Jean