Had those moments, I do know the white crested polish lay an off white egg, and My polish have always been really good layers almost everyday, don't know how these scrawny little birds muster an egg a day.
Do you have other hens that are laying, roosters sometimes go into nestboxes to goof around, I am not an expert on silkies, but no silkie hen I ever had, had that red of comb, as well as the poof streaming back, hopefully the silkie people will pop in.