Choosing the right size

I foolishly printed out a size 10, wanting to make a more relaxed fit shirt, like in Liesl's recent summer shirt post, just to figure out that I was actually a size 0 according to the size table :(( So, before cutting the fabric, can you please advise me on what to do next in order to get the shirt I want? I'm an A/B cup and petite. 32" in bust, 33,5" in high bust and the length of the shirt is definitely smaller than in the finished measurements for size 0 by about 2,5". Shoul I go for a size 2? Or should I simply stick to 0? Thanks a lot!