Burnout

Anyone else feel so burned out today? I'm a sahm, my hubby is gone all day every day until sometimes 8-9pm, and I'm alone with my 2yo and 2month old. I have no motivation to play today, I feel so guilty because I know my toddler needs me and wants me to play and be happy and energetic....but it's not happening. What do you do to kick the baby blues?