You might want to consider consulting with a plaintiff-side employment lawyer in the area where you worked. They can tell you what realistic expectations are, whether you have a claim worth pursuing, and the various avenues open to you, such as an EEOC complaint process, a state employment discrimination process, or other avenues. Many will offer a free consultation, although whether the good ones where you are, I can't say. If you can get a free consultation, which is usually 30 minutes to an hour, you should present yourself well, have any relevant paperwork organized, and be prepared to give a coherent capsule summary of what happened in very concrete, linear chronology. Including the parts that might not be favorable to you. Good luck!