As someone who doesn't play that many horrorgames because of being easily frigthend, I must say that this indeed felt like the few ones I've played and made me very anxious and scared, which I would guess is exactly what you wanted! The atmosphere was terrifying from the start and multiple times I just didn't wanna procede which is exaclty what Outlast and PT accomplished.
So I must say I loathed every second, which means you did great! Awesome work! :D