Going through phones

I’ve been with my partner for a couple of years and currently pregnant, I have never, never gone through his phone but recently I’ve been having a “feeling” I’m just so scared because I don’t know if I want to know.. I don’t know how to shake this feeling, I don’t know if this is because I’m pregnant.. anyone been through something similar? I’m so terrified to go through his phone, I’ve had plenty of opportunities but never have…