If you believe you have a valid whistleblower's action for wrongful termination, get your case reviewed by a lawyer ASAP. The statute of limitations on whistleblower cases can be extremely short - under some statutes, as little as 30 - 90 days.
Even assuming you had a compensable injury for worker's compensation purposes, wage loss benefits start after three missed days of work or an overnight hospitalization. You say that you missed only three days.

