Feeling Low

Dun know what's causing this feeling deep inside me. My desk is in a mess, I stack up everything to the side of the desk, papers and books filing up and now there's air plants on the left hand side of the desk, stacks of papers all over my desk, mugs, stationary and what else... all over my table. I have no mood to clear it, I have no mood to go to class, feel like i've reached the end of my career as a teacher.. this is what i fear.. so stressed that i have lost the desire to do anything.. help!