you have 2 options.

Option 1: work permit based on Economic hardship. Go to your international student advisor and ank about the form and requirements. you have to pay $240 or $360 (i am not sure) for the processing and this process may take upto 3 months. you dont have to work in the field of your major and you can work 20 hrs off campus. you also have to prove that you are facing substancial economic hardship due to your sponser facing something unpresidented circumstances.

Option 2; CPT curriculum practical training. Your international student advisor has to authorize this, your major needs you to have an internship or work experience as a part of the curriculum and you will have to enroll in that internship as a course for credits. This process may take 2 weeks. But you will have to produce an offer letter from your employer. You can take part time CPT 20 hrs or full time 40hrs. If you take 40 hrs CPT for 12 months then you cannot get OPT later.

hope this helps