If you were hired, how is there discrimination? Just because a group of people are of a majority race/color, it doesn't mean discrimination. It could mean they are the best qualified for their positions.
I have been the only white female in an African village hospital/clinic. I have been only one of 5 white Americans in an Asian city who worked in healthcare. I have been the only white person on a unit in a hospital in a major metropolitan city in the United States and the nurses refused to speak English at the nurses' station. So what. There are worse things in life, I promise.
If you have been passed over for promotion because of your race , then you might have a legitimate complaint. If it's simply because the facility head honchos are white, and discrimination can't be proven and you set out to complain about your perceptions, you will only encounter trouble.