My question involves labor and employment law for the state of: PA

I've worked at a public school for approximately 20 years at a non teaching position and for the past 5 years I've been working in a hostile environment. I have reasons to believe that my superior is predisposed to undermine and try to push me out of my position by virtue of a very unclear accusations about functions unrelated to my job and functions that are based on feelings of parents. I'm a POC working in a predominantly Caucasian school. I can't list specifically what the harassment is but a few of us females definitely get treated differently and looked down upon and we're all mostly over 30 with all male Caucasian superiors.

I'd like to know what I can do to perform my job and keep these people away. Should I file with the eeoc? I've taken the matter to the union but they are ineffective. I have a few years left til retirement and every year it seems to get worse!