The fatigue is kicking in for me as well. Starting napping during DDs nap and going to bed early. I remember it being worse with DD but maybe my perception has changed after not sleeping for her whole first year basically, she was a HORRIBLE sleeper, so I want MANY nights with only a few hours of sleep. So this feels like nothing compared! But definitely feeling it now.
I got lazy yesterday and didn't work out. I do 6 days a week. I made myself today, it's more mental why I didn't, so i just need to force myself. If it is PHYSICALLY too hard i will modify. But if I just don't "feel like it" then I need to suck it up!