Q: It's been a few days since I applied and the changes haven't taken effect yet , should I worry? A: No. That's perfectly normal.
Q: I'm in my first year of my gold card, will I be charged the AF when I downgrade back? A: Yes you will
The cheshbon is that you upgrade, get the points, buy the AA GC's do the Platinum Guy's Great Mehalech, then downgrade back or close and get the Annual Fee of the Plat reimbursed. If cancelled within 60 days you get it all back; if more than 60 days it is prorated.