From now til birth you have plenty of time to play around with names. And instead of letting that be a drag, try to think of it as a great opportunity and have fun with it.
I haven't been able to settle on a name yet either. I had wanted Levi Benjamin but DF doesn't really care for it. So we are still undecided and picking out alot of names.
As for the gender, I'm betting that she is a girl. But being prepared for anything isn't bad.