Haircut embarrassment…

So I struggle with psoriasis on my scalp, which means it can be very flaky… last time I got a haircut at a salon, the girl asked me “do you always have this much dandruff?” And I’ve been so embarrassed ever since… well I’m ready for a haircut again but scared to go back to anyone. I’m thinking of just going to a Great Clips and hoping it’s not so bad. Does anyone know if they will cut on dry hair if it’s long or do they have to wash it? It’s not as bad when it’s dry. Thanks!