I am not sure where you are from but I know in Ontario the review is about whether or not you are now medically able to work. They cannot make a decision based on the economy, it needs to be about medical information. You may have a legal clinic in your area for low-income people. If so, I would encourage you to ask them if they can provide any support with your review. If they can't they may be able to at least answer questions. The people who are doing the review can only make their decision based on the information you give them, so I would be as detailed as possible in describing your symptoms and how they impact your ability to work/your daily life. Include any medical information or documents that you can.
Hope that helps!