Helena Schedule a time to talk to your Mom so that both of you have a chance to cool down/your Mom doesn't feel trapped.
Make it fun, prepare tea and treats, do everything to show your Mom that you are an adult. When you are ready, clearly lay out the reasons you don't want to wear it and what it is preventing you from doing.
Ask her why she wants you to wear it, then talk about how you are ready to change, to become a better adult, and how by doing things X that meets the needs of your Mom, it obviates the need for wearing.
Obviously you haven't done anything wrong and you shouldn't need to do any of this, but, sometimes, as adults we make compromises to make other people happy.
They are your parents and it is probably worthwhile not to burn bridges as you may need them in the future.
You should also come up with a plan for what life would be like without your parents support, what you would need to get there, and how that might work out. It's something for you so that you don't get cowed by your parents into doing something you don't want.
