Just keep carrying, those feelings will go away once you realize that people don't run away screaming "OMG HE HAS A GUN!" everywhere you go. Hold your head up, smile at people you walk past, and try not to look for people to see if they are looking at you. This makes you look suspicious. My advice, act as though everyone else is the odd one for being unarmed.
I always tuck in my shirt, and typically I wear a shirt with a collar, but occasionally a t-shirt. I think this lends a little more of a professional appearance and thus I believe many simply assume I'm a plain clothed police officer. FWIW, I also carry a PT1911,. mine is a duotone with cocobolo grips.
Now that things have cooled down quite a bit, I suggest another Downtown or Strip gathering.