I was fired for one reason and then found out later that it was for another. Do I have a case?

An employee without a union or employment contract is an employee at will and can be fired for no cause at all. Unless race, gender, age, religion etc... is the basis for your firing, you have no recourse.

You might consider working at a place that allows you to be who you are. Only you know the environment there at the job.

Good luck to you.

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Pennsylvania is an 'at will' state which means that unless you have an employment contract which covers termination (which, for example, union contracts frequently do) you can be terminated at any time for a good reason, a bad reason, or no reason at all.

You cannot be terminated on the basis of age, sex, religion, national origin, or disability, however the facts you have provided do not suggest that your termination was on any of these bases.

I'm not suggesting that you were treated fairly, however employment lawyers cannot help with what is not fair, only what is unlawful.