When can I change my belly button piercing?

I got my piercing done around November 4th I've been taking care of it since I got it and so far it's not infected. On the paper that the piercer gave me it said I can change jewelry in 2-3 weeks. It's already December and I'm thinking of changing it by next week but I feel like it's too soon. But I read online it said 6 months? What would you ladies recommend?