Is he stepping out AGAIN????

So just a little back story. My husband and I have been together 3 years married for 2. We have two kids 1 and 2. He’s cheated before and we separated for about three months just recently and we had an agreement NO MORE SNAPCHAT. Well he is a truck driver and they get things called settlements. I usually print them off from his email. So this morning I went to print off the ones I do not have for him to organize his tickets. I logged onto his email and found out that at 2 am he was logging into a Snapchat I never even knew he had!!!!! 😡😡 I’m angry right now and kinda hurt and worried that he may be stepping out again. I need opinions....I haven’t confronted him about it yet cuz he isn’t home but I’d like to once he does come home.