5 Days Postpartum - Energy Levels

My energy levels at the tail end of pregnancy were almost comical.  Getting around took so much output, I required a lot of downtown, but I was still fairly high functioning.  My levels even five days after giving birth are still so low - even in comparison.  I feel in some ways like I've been in a recent car wreck. 

I usually feel fine until after doing some light activity - and then it hits me all of a sudden.  Today, we were out of the house for an hour shopping at HyVee.  Yesterday, we were at the soccer fields and then my sister in laws.  In a few hours, we will be heading back out to the soccer fields, and I know that if I am going to make it, a short cat nap will be required.

With this low energy, I wonder when starting exercising again is really realistic.  I'm doing some light strength training on my transverse abdominal (lying single leg lifts and reverse crunches - 2 reps of 20 each).  It's not too hard, but it's not aerobic either.

(On a side note, the scale dropped to 151 today -- I know it's water weight, but it's still exciting to see that rapid of weight loss!)