Can I sue a state agency for discrimination and retaliation?

My son's physician completed the FMLA certification for intermittent FMLA to continue his therapy. I filed a complaint with HR because I believe my supervisor denied it to retaliate against me. Never been counseled before, but she started writing me up the same day. I filed a complaint with DOL and the retaliation continued. Everytime she wrote me up it was related to me taking my son to therapy appointment to which she gave me permission to do so.

I was fired by mail after she placed me on emergency leave. The Health and Human Service Dept of Civil Rights accepted my charge for retaliation. After the investigation, the file was sent to Austin for review. The Dept of Labor complaint is still under investigation. The EEOC filed a charge for discrimination based on my relationship with my disabled child and retaliation. I really need help with this situation. I appreciate your help.

TW