The restaurant I work at recently announced that it is changing its dress code for servers. Previously, we were required to wear long-sleeved white dress shirts, black slacks or skirts, and a vest. The restaurant is moving to a uniform requirement that will include a short-sleeved shirt. My religious beliefs require modesty in appearance, including covering our arms and legs completely. I belong to a very small religious group that some refer to as a "cult," and I prefer not to discuss my beliefs with others. I asked my manager for an exception to the requirement so I could continue wearing a long-sleeved shirt. Because I didn't want to discuss my religion, I told him that I am uncomfortable showing more of my body but didn't tell him why. When he told me he couldn't make an exception, I told him that my religion requires me to cover myself. Now, he's saying that he doesn't believe me, and thinks I'm just trying to avoid the new rules because I have "body image" issues. What can I do?