This is a dilemma. However, at this point you have a few options.
1) You can contact your previous school and see if you can make arrangements to return. Since you attended 3 years, that means that you are pretty close to finishing. Depending on their rules and regulations, they might allow you to set up a payment plan that will allow you to finish your degree there. This would also allow you to go into a deferment status and not have to pay on your student loans until you graduate.
2) Apply for a
private student loan that would enable you to repay the school and resume receiving finanical aid. Keep in mind that you would have to be enrolled at the school in order to receive the student loan.
3) If you decide to attend another school, you might still be able to receive financial aid, as long as you do not owe any reparyments on any grants or loans. You can find out if you are still eligible by completing a FAFSA application. If you have any overpayments, you will see it listed on yourStudent Aid Report as a comment code saying that you owe a repayment. The only problem with attending another school at this point is that your previous school will not release your transcripts and you would basically have to start all over again.