when I was learning how to ski switch I was the same. In fact, I was doing switch 5's before realizing I was spinning my opposite way due to looking over the wrong shoulder going into the jump. Even now when I'm straight lining something switch I still look over my right shoulder because it feels more comfortable.
Every time you learn something new it's going to feel unnatural at first. Just force yourself to look over your other shoulder. When you're carving switch down a groomer you should be alternating from looking over your left shoulder and right each turn anyways.