Don't wait after being fired from a job to talk to an attorney. In many cases the faster that you act and get representation the better the chance of resolving the issue or getting information and documentation will be. In addition remember that filing for unemployment may also require documentation and an attorney can also help with this process.
Just because you've been discharged from a job unfairly, that doesn't mean you can sue for wrongful termination. To be considered wrongful termination, the employers must have fired or laid you off illegally -- without justifiable cause and without following standard procedure.