When you encounter something like that. Take a moment, breathe and step up. If she asked you to switch with someone else, just tell her no I'm fine. Because how you react now will determine your future. I regret not stepping up in college because it has made me want to always stay on back and never come forward even when I've excellent inputs either in projects, presentations or workplace. Don't feel bad. We're stronger than this. And we're a community having each other's back.