Sorry that happened, it definitely can hurt ones feelings. Me and my husband were at an auto shop last week; the waiting area was small, and there was another woman waiting for her car. Anyway, I asked the service manager if they had WiFi for customers, and he replied "yes, sir". The other customer was in the restroom, but I'm sure she heard it since the restroom was in the immediate area, so it was exceptionally embarrassing to be misgendered in the presence of another woman. The service manager did not miss a beat, and continued to explain how to access their WiFi; I said thank you, but I was fuming inside. The other woman's car was ready, and she left when she came out of the restroom. I continued to think about it, and I was pissed that someone could be that rude and disrespectful; after all, I may be trans, but I am clearly not a man. When the service manager left the front desk, I brought it up to my husband, and he told me that he was pretty certain that the service manager was addressing him as sir when I intially asked the question (which could have been the problem, since I hadn't used my voice for 30 minutes or so before I asked about the WiFi, so it may have sounded a little lower pitched, which is something I will work on). I decided to stand up for myself (and as a teaching moment for when he encounters other trans women) and when he returned I said that it was very rude of him to call me sir; he seemed shocked, and denied saying it, but he apologized if he did, and actually hung his head and walked out, so at that point I'm thinking that maybe he was addressing my husband when he said sir, but then again maybe not; I don't pass 100%, but I should be treated like any other woman and if someone disrespects me, especially in front of one of my peers, I am going to let them know that it is not acceptable.