Totally normal to feel like this, i was all over the place in the lead up to Charlie being fitted with his hat. I got our provider to drill air holes in the back of it so that it let the air flow.
I kept telling myself that even if it didnt work i would be able to tell charlie i had tried everything to help him. Of course it did work and we went from 109% brachy and 11mm plagio to 91% and 1mm in 24 weeks. That was a pretty long time and most people dont wear the helmet so long when they start so young, but Charlie really had a totally flat head, it really did look like someone had cut the round bit off at the back!!
My hubby and i were just saying the other day how fab his head looks now, i never imagined i would not really pay attention to his head every day, i used to be soooo head obsessed and now i can hardly remember how it looked pre helmet.