Only three options are there:
1. Your school can hire you for office work or some cognitive skills in any departments (on campus job is ok . limit is 20 hours during school semester and full time in summer if you are not full time load)
2. You can get CPT. For this the work should give you some credits that can be applied towards your graduation. I would love CPT to have.
3. You can get Employment Authorization Card based on financial hardship. For this you are to show the evidence too.