Girls! 5 days ago there was itching around the eyes and behind the ear…

Girls! 5 days ago there was itching around the eyes and behind the ear, and some scales appeared on my scalp. I went to a dermatologist and he said it's seborrheic dermatitis. She prescribed me "Dercos" shampoo - not cheap! It got even worse from this shampoo! Can you tell me who has encountered such things during pregnancy, what shampoos did they buy? I want to change shampoo ?