Hi japanese, They are not going to approve you without FP2 clearance. So its not possible that your 485 gets approved while you are abroad.
And you don't have to worry about travelling on AP. I'm from a country which was on special registration list, but I travelled back home in December 2003, and May 2004, had no problems at all. Go see you mom. Don't let this alert thing affect your personal life. These alerts will never stop. They are there to scare you, if you know what I mean. If you are legal, and have all documents in order, then what are you afraid of?