A very tiring routine

My 2 month critical care training course has just started and I am feeling that the tiring route is crawling up my neck causing difficulty to breathe. Attending the lecture from 9:00 am to 4:00 pm then head straight to my shift that is supposed to be 3:00 pm to 11:00 pm is would really burn every calorie in your cell.
I have so much on my plate, I have I could finish it all off.