I really feel you on this, waiting until September is so tough especially when you already have someone in mind. I don't have a specific NUH gynae to recommend off the top of my head, but maybe you can call the NUH Women's Centre directly and ask the staff who else has availability, as they usually know which doctors have similar areas of expertise. A friend of mine did that and the coordinator was really helpful in matching her to someone suitable. Hope you get an appointment soon lah, hang in there!