Motivation Slipping

My motivation is slipping a little at the moment mainly due to lack of sleep, tired and sore from weights yesterday. My food choices have been good today but so don't want to go to the gym.
Just want to curl up and go to sleep.

Today's exercise at the gym was:-

x-trainer - 18 mins level 12
x-trainer - 2 mins level 10 cool down.
treadmill 10 mins walking at 6.5 pace.

Great achievement seeing I didn't want to go in the first place, as I'm really tired and not that motivated at the moment.