working mama

how do you working moms deal with tiredness? I have been a stay at home mom for a very long time but finally made the move to go back to work. I get up at 5am and get myself and baby ready and then drop him off and work all day long and then need to come home and clean the house ans cook dinner and bedtime routine and 99% of the time I'm too exhausted to remember to eat the dinner I cooked or take a shower myself. side note: dad IS in the picture but he works way way way more than I do and often times is out of town so he CAN'T help unless hes home, which he does but hes gone for 2 months. thanks for any suggestions.