What are the side effects of not sleeping at all for a few days? OK I have night had any sleep at all since Saturday night.  I have been doing ok. Just weak.  I need to go to my class today from 7-3 then when i come home I can sleep finally.  But what can i expect today.  I just feel weird and I cannot eat.  Is there a way to help with energy?  Should I be drinking more water than usual?  I have been really studing all week and I am finaly done and taking the test tomorrow.  Please help?

Summarized question: What can i do to feel better after a few days without sleep?