you can appy fee waiver, the only thing you need to do is tick finincial hardship in I912 form and submit some document to support your case, the document includes a letter from your DSO, graduate assistance letter, your rent bill and other bills (if you can provide) and a letter from you stating that the money you earned is not enough and you cannot get support from nepal because of earthquake. thats all! if you are denied you will get your packet returned to you with in 20 days. good luck😀