Is it possible to work and pass at the same time?

My boss just scheduled me for three double shifts in a row and I really need the money to pay my rent this month. I am totally exhausted and I have absolutely no time left to study for my nursing classes. The panic is hitting me hard because I am staring at a failing grade if I do not pass. I was so stressed earlier that I seriously looked for HESI exam help just to get through this mess. Does anyone else work full time or do you have tips to manage this?