ok...so im assuming, it must be 4 blocks total in the year which each block containing 2 classes....so in a sense you're still taking 4 classes per semester or 8 classes per year....
This is the truth to your situation, you would have been well more than covered by pell and your loans if you had chosen a cheaper school. You exhausted all your pell grant and had to use loans to cover the rest of the tuition which didnt leave much for your pocket. Honestly man I would see about withdrawing at this point. If you have to work and end up failing a class or two...those kind of schools make you pay it back and hold it against you before you can come back.
You dont need stress if you dont have to man. I dont care what nobody say about being a man or working while in school. You want to be as focused as possible on your studies if you can.