I have never had lilies before so please be kind to me on what I’m about to say…
This morning I brushed past the vase with the lilies and noticed the dust had fell onto my cream carpet. I swept across the dust with my hand, carpet turned yellow, panicked and used Vanish to get rid of it. Not realising until after Googling “how to get rid of pollen stains” I saw don’t rub the stain in 
Has this happened to anyone else and did you ever manage to get the stain out without replacing the carpet?