I also believe that AOW right after OW is not the best course of action. I see some people doing pretty well, but also people who have a really hard time. I wouldn't go so far as to say do 20 more dives, but you should at least be pretty good in terms of buoyancy control before doing AOW. If you can do a few easy dives before your AOW focusing on buoyancy, you should be fine. If you are not able to get any dives in, then some practice in the pool goes a long way.