I have to admit that after starting my transition I do feel at times more .... vulnerable? in some places - especially in the empty office buildings during the weekends (when I happen to find myself at times, if I need to pick some things from my office), when I jog during evenings and mostly when I am alone and after dark. It is a totally new feeling and I sometimes laugh about it trying to convince myself that I am just exaggerating and it all is BS... But it is not. I have to admit that I do not pass yet - I have been miss'ed a couple of times in the street as well, but at my current stage it is rather an exception than a rule. Nevertheless...
The HRT has completely changed my attitude and I had to readjust A LOT of things. When I was in total denial in guy mode and was in potentially dangerous surroundings I used to project the attitude "I am the most dangerous person here" or "What are You looking at? Dont even think about it". I cannot do that anymore, because pretty much of that was induced by T - there are a lot of things associated with male presentation and conditioning, which are very much depending on T - as You will find out). So what do I do now? I carry pepper spray, sometimes blank shot revolver loaded with pepper and CS rounds - that thing is also heavy enough to club someone over the head if needed. I have always been aware of my surrounding, but I am paying even more attention now, besides, if I see someone I dont like, then I just cross the street.
I have more than decade of training in martial arts, so I am pretty confident that I could handle one unarmed attacker with basic training, or two unarmed untrained ones (more than two if those are 18-20 y.o. punks). An attack against man starts with a punch, but attack against woman - with a grab and hold - so I am actually in advantage here - the closer he is to me, the easier for me would be to chin or jaw him with my elbow (potential K.O.).
But my best defense actually is to try to stay away from potentially dangerous situations...
It was quite funny that my male friends, as soon as I came out to them, took that patronising attitude that "whoever messes with me, will have to deal with them etc". It was quite nice to hear, but at the same time I felt like "Do they really think that I am instantly turning into someone who is unable to hold her own ground? Really?"

So I challenged my friend to a round of arm-wrestling and since it ended with a draw (I could never win against him, but neither could he get a decisive victory), he ended to be confident that I can be safe