Congratulations on your pregnancy, I absolutely loved being pregnant, it is so great when the baby is kicking and flipping around inside of you.
I am in the same boat. When I was pregnant with my first 27 years ago I had to go have them hemmed, but when my I was pregnant with my last one 11 years ago I found that the maternity shops here in CT had petite sizes which was a blessing in disguise. What I did was bought 3 or 4 pants and shorts that I could wear with many different tops and then bought 6 or 7 tops and mixed and matched. One of the girls I work with is in the same boat, she is a size 1 and is only 5' tall; she is doing exactly what I did except she bought tops from Wal-Mart because they are cheaper. Hope this helps.
T.