Been Gone for awhile

I'm back now but I am now in a TERRIBLE quandry. My job refuses to adjust my schedule for days that I have school. I have school Friday evening and saturday during the day so I cannot work friday night. For those who do not know I work Graveyard shift wed-mon nights, I have three classes to go before I gradute. I already put off 1 class 3 times because work could not give me the time off. I was supposed to walk across the stage this week and get my degree, The rest of my friends who I have been in class with for 2 years walk this week. I am left behind and in a quandry. I am in a screwed if I do and screwed if I don't dilemma. If I quit school because I have to work I will have to pay back my student loans which because I am not earning even close to the poverty I will not be able to afford. If quit work so I can go to school I will not be able to afford simple stuff like food and a roof. Sure I could work in Stacies restaurant but it is still getting started and we cannot afford an employee. I amlooking for options here. Any one have any? Email melet me know I am at my wits end (I know only half way)