Should I continue to go through my boyfriends phone?

Hello fellow potatoes! This is my first Reddit post in a long time so be kind! So for context, my boyfriend (24) and I (F28) have been dating for almost two years. We live together along with my son from a previous relationship and I feel like for the last few months we have both grown distant due to life stressors but I never really thought about him being unfaithful especially since across all social media including the platform in question, it’s clear he is in a relationship. He recently started using an old phone for work (car detailing so think taking pictures, messaging clients, etc) and curiosity got the best of me today when he was out and the phone was on the nightstand. He had notifications alerting him that multiple women had posted recent videos on tik tok which bothered me and so I went into his tik tok to find that there is a recent thread conversation with a girl. My anxiety did not allow me to open the thread to see what had been shared back and forth but I’m spiraling about it. I looked her up on Facebook, only to find that she lives on the other side of the country and does not have him as a friend so it’s not like a friend from school. I am not in a good spot right now to blow my life up completely but now I’m wondering if I should look at what’s being sent. Aside from this, I have never seen any weird messages or notifications pop up on his normal phone but I know people can hide stuff well. I am just a little hurt also because he knows that the reason that my child’s father and I are not together because he cheated on me for a long time via Snapchat so I already have insecurities related to that. TIA!!