Context: I am male to female transgender and do go by a name other than my legal name.

I have been out of the closet for nearly two years this coming March and have been using the name Valerie since October a year and a half ago. I am far from passing but starting medical treatments as soon as this Thursday. Most of the time people are pretty good about using my name and pronouns and I'm pretty forgiving of slip ups depending on the situation but I had one person who kept using my deadname "by mistake". 

Back in August I finally decided I wouldn't even respond to my deadname, unless it was someone who I wasn't out to yet, so I tried to ignore this person as long as I could. This weekend I snapped, I was out shopping for clothes with some friends in a forever 21 and she kept calling me 'he' and 'him'. I yelled at them in the store and put the things I had grabbed back before storming back out to drive home.

When I got home I started feeling really guilty because I've never really gotten so angry at anyone to the point of causing a scene. I haven't talked to her since nor have I heard from most of the other people I was out with, the one that has talked to me said it was pretty shitty of me so I decided to post here.