Nefarious, I feel for ya girl! Been there, done that. When I was in college, it was literally living penny to penny. I lived on the WORST street in the WORST neighborhood in Lansing because the rent was cheap. The easier way for me to make the most of my money was the farmer's market (way cheaper than a store) and discount food stores like Save-a-lot and Aldi's (still shop there today, because I like to save $$).
Also, I took a second job at night at an answering service just to supplement the income. Look around your neighborhood, is there a convience store or gas station that might need someone on second shift?
Don't give up hope, there's always a way!
Kel