Candy Cream seems to be an 8 to 9 week flowering strain, so if your one is only 3 weeks into flower you have 5 to 6 weeks to go! Get a mini microscope from eBay for about $5 to check; can’t tell from your photo but it can’t be ready yet. Amber trichomes turn up on the sugar leaves first usually, then on a calyx. You should have mostly milky trichomes if you see amber ones on the sugar leaves.