Thanks for sharing your experience. I will say that on some days my energy is okay, other days - like Monday when I literally layed down under my desk - I'm excessively tired. What I've been doing with regards to the exercise is not necessarily great - I come home after work and take a nap and then get back up to do it. Crazy, I know.
You know, I keep thinking how I don't know how I'd have a child already and deal with a pg. I bet it IS exhausting running errands, etc. and just taking care of your son. My hats off to you and other with children for sure.