Employment Law Questions? Ask an Employment Lawyer.
First, I am sorry to hear about your situation. I hope you are getting well. Yes, absolutely you should first get yourself better then you have a couple of avenues. You can sue them for breach of contract which can be costly and expensive or file a wage claim with the Colorado Division of Labor. You can find the wage and hour complaint form here: https://www.colorado.gov/pacific/cdle/complaint-forms.
The filing should include as much information and documentation as possible. This process can be completed with or without an attorney.