I'm assuming the spirals are a 2g too? Because 4 weeks will be healed enough to change the jewelry if it's the same gauge.
If it's 0g? Wait 2 more months.
My Piercings:
Ear X 8 (2x0g & 2x 10g, 2x 14g, & 1x14g helix, 14g conch), centre labret (14g), eyebrow (16g)
-A youngin' who actually knows her way around body mods-