Today was a real let down!

My 12 yr old son decided he wanted to jog with me. So we did and he kept up, but I was just not as concentrated as normal and just really wasn't into it. Soooo tired and just icky feeling.
Could not figure it out, then got out of my dumb phase and counted the days on the calendar and lo and behold tom came to visit . No wonder I have been tired this week!!so glad tomorrow is a free day. Looking at possible doing heavyhands for my 20 MAS. I dunno.