You know if you are the victim of some unequal treatment or injustice, make a list. Of names and places, with attention to dates and even time of day. It might not help you now but it may later. It sometimes does with me. Then maybe memorize it or put it in your email account, or even pajamas pocket for the worst case scenario. I'm serious.
I find that if it's serious enough worth making a list over, you'll probably remember it anyway. That's just speaking from my own experience. If something serious like that happens, you'll probably remember the other things that happened throughout the same day, and given that you'll remember those things, well, there will be a paper trail on one of them, which would tell you the date if you did happen to forget.
Sometimes these things don't happen as one big event but as an accumulated pattern of behavior from someone. My ex had been having some trouble at work with a coworker that was generally an angry person that really didn't like many people. When my ex started working there he was the new target for this guy. One rude comment, or angry outburst, was not really worth going to a supervisor about but accumulated it showed that he was creating a hostile work environment. I advised my ex to keep track, I bought him a small notebook and at the end of the day, he would get in his car and write in it if anything had happened. He never needed to use it but he had it just in-case. For him, it was more to cover his own ass if the guy decided to try and get him fired or something, rather than to use it to get the other guy in trouble. It would come in handy to document things like sexual harassment too. You might not immediately go to HR if a coworker called you sweetie or asked you out on a date but if you ask them to keep things professional and they continue, even these small things can become oppressive and uncomfortable. Keeping track of each incident, and writing down who might have witnessed it, could be the deciding factor in what gets done about it.