Keep up the good work!
I noticed that when I was new to OCing i would be very alert and aware of every face that was looking at me and their reactions. I finally realized that i was getting the reactions i was getting, because i was armed, standing in line, looking everywhere! Of course people were going to be look at me funny! Lol! When I OC now, I look as though the gun belongs there and i am not concerned with those who see it - it seems to solidify the perception that "Hey, this guy is alright, he's not nervous, so I won't be either."
I know its easier said than done, but once you relax and associate you wearing your gun the same was as a hat - the less attention you will attract towards yourself.
You will find that 99.8% of your OCing will go unnoticed and uneventful.
Sounds like you did great bud.