Yay! You did great! It gets easier each time. The first time I went shopping for clothes was at a thrift shop...I wasn't out or anything, but knew I'd be there someday. Was with an MTF friend of mine, and I was *so* self-conscious!! I think I just bought one blouse, didn't try it on or anything.
Panic city!! LOL! Now I just stroll on in, browse everything, hold bras up to me to see if they'll fit (Nope, stores don't carry Big Mama sizes), chat with the people there...all is good.
Have fun!