Plagiocephaly - PLEASE, HELP ME! I don’t know what to do!

Ta

My baby girl is 3 months old and I’m pretty sure she has plagiocephaly, her head is exactly like the pictures I see when I search for plagiocephaly on the internet, pretty asymmetrical on the top, on the left side and her face is asymmetrical too, the right side is smaller than the left side! Her pediatrician just doesn’t care, she says it’s normal and will go away by itself, but I don’t trust her, time is passing and nothing changes, I want to go to a specialist because I read that the treatment with the helmet should begin as soon as possible, so I’m totally desperate!!! What specialist takes care of this?? I have no idea!! Please help me!