If I feel I was fired for filing a complaint against the CFO of a hospital where I had been employed for 13 years

I had a perfect employment history prior to mid-July 2015 I had objected to wearing polo shirts in my position as a financial counselor the CFO discussed me issue of professional attire with another employee The CFO had recruited 4 employees that I know of from Harrah's Casino and bars He made my Manager hire them regardless of their qualifications It was with one of these recruits he discussed my issue of polo shirts with