I am so sorry this happened, but I see something good in it - you have encountered and survived a very stressful situation as your authentic self, showing a lot of grace. That's commendable since you are really just beginning your journey.
Yes, she was in the wrong and she was either a bigot or she just didn't know any better and you took the time to educate her. As a result maybe if there is a next time she'll show some sensitivity.
You must not let this get you down - I got clocked lots of times when I first started going out - most of us do. You persist - you keep practicing your makeup, dress, voice, and mannerisms and you keep being your authentic self and sooner or later the clocking lessens or you get to a point that you realize that it just doesn't matter to you because you ARE being authentic - what other people say or think has no relevance for you any longer. They can take you or leave you and it doesn't bother you one whit - you developed some thick skin.
Adopting the attitude of "I'm concerned about ME and am not worried about YOU think" is critical to us because we have spent far too much of our lives trying to please others, worrying about what others think, and trying to be who they wanted us to be - leading us to live a false life for them. Going forward - just be the best you possible and disregard what others think - they aren't walking in your heels and they don't know the depth of the struggles that led you to where you are today - therefore they have no right to judge you.
Devlyn - I'm sure that no offense was meant by Melitta - she had a very rough experience and probably wasn't thinking that much about what she said and what effect it might have on others when she wrote this. We all fit under this umbrella and we are all members of this family.