I'm barely 5'1" and the only place I could find pants without having to alter them were OLD NAVY!! My whole maternity wardrobe was practically all Old Navy, I love them plus if you go often enough, the prices drop very quickly so you can get a price adjustment. And they give you free shipping and returns for maternity shopping.
Gotta get the Short or Ankle length pants of course. Don't know what I would have done without them.