Have I lost of grafts 4 weeks post op after scratching off crust?

Hello all :) I had a hair transplant 4 weeks ago (FUE). I experienced very little shedding since my transplant probably because i was shampooing very very gently on the scalp. This in turn resulted into a thick crusty layer on my scalp. Today I had this “brain fade” moment where i decided to scratch off this crust which in turn resulted into nearly 100-150 Hair that fell off. Are these dead hair? Or have I now lost 150 precious grafts!? Many thanks.