to have a lot on your plate
to be very busy; to have a large amount of work to do
to burn the candle at both ends
to work late and get up early
to recharge your batteries
to regain your strength and energy by resting for a while
to work yourself into the ground
to exhaust yourself by working too hard
to put your feet up
to take a rest after working hard
to be drowning in work
to have too much work to do
to be at your wits end
to be overwhelmed by work and not know what to do next
to come apart at the seams
to be in a bad condition; to lose emotional control
