These things happen. If, however, you believe that you can prove you are not being selected because of your recent health concerns, you can
file a complaint with both the state discrimination agency and the federal one, the Equal Employment Opportunity Commission (EEOC).
In Georgia, you can contact the state agency here: http://www.gceo.state.ga.us/
You can contact the EEOC here: http://www.eeoc.gov/ (there's a ton of great information at this website!)
If you wanted to know about something else, please be a bit more specific on what you had in mind.
If you start with the state agency, in most states they'll file a complaint with the EEOC on your behalf at the same time.
There are deadlines for filing, so don't delay!
Complaint investigations are free. They're not always the best, XXXXX XXXXX do get a free investigation. If it looks like they are going to file a "no cause" finding, withdraw your complaint before they do. That way, if you go to court, a "no cause" finding can't be used against you.