You'll need to wait for rooster feathers (or not). Hatchery SS can have really big combs and it's not too much color for 10 weeks so unless the comb was tiny and yellow a week ago, there isn't anything else to go by.
Thank you. This makes me feel better. The comb has always been pretty pink and never tiny compared to some of my other breeds that have a single comb. This is a picture from about 4 weeks back.