Beyond ridiculous

I know I am stressed.
This clock is showing 10.50 pm.
I left the house at 7.30 this morning, left school at 6pm, home by 6.30, an hour off for tea then working again. Finished at 10.45
I am getting upset with students because they are being lazy and avoiding putting effort in. I am short on time, patience and energy.
I managed 4 hours sleep last night and honestly, the last 24 hours has seen my pain increase to similar levels as before the operation.
I think I am about to break and when I do it will be spectacular.
I know that I am not alone in feeling that this is ridiculous.