Retaliation - Did I truly waive my rights to file an EEOC complaint?

If I signed a separation agreement in Texas which I had to waive my rights to sue my employer or file an EEOC complaint, am I able to file an EEOC complaint for retaliation from my former employer? My performance was flawless but I filed a complaint to my corporate office against my boss who was verbally abusive throughout 2017 and was promised "protection". After other people came forward, the investigation proved to be in my favor; however, two months after that meeting, I was terminated.

Since my departure in November, events have further proved that it was retaliation and the person who was hired as my replacement was a friend of my VP's and male, making it an all male team. Did I truly waive my rights when I signed that letter?