It depends what kind of company this is and what your job is. An employer can enforce certain dress code/grooming rules if they're not discriminatory.
It's unclear what discrimination you were complaining about "before." Was this also about your religion?
See an employment litigator to fully disclose the facts of your particular situation. In the meantime, prepare a chronology of everything you've experienced and witnessed, with names, dates, and other witnesses to every event.
Disclaimer: Please note that this answer does not constitute legal advice, and should not be relied on, since each state has different laws, each situation is fact specific, and it is impossible to evaluate a legal problem without a comprehensive consultation and review of all the facts and documents at issue. This answer does not create an attorney-client relationship.
I agree with Ms. Koslyn -
you should prepare a full written summary of everything that has happened, along with any supporting documentation. Take this to a qualified employment law attorney. Nobody should give you advice without all the facts.