My husband and I are great with our relationship and we have a new baby who turns 4months in a few days

But my question is a bit ago he was acting suspicious with his phone and I saw part of a message with someone so I snooped and I feel regret doing it but also glad I did I saw him talking to a girl -who was a catfish- but ever since I keep wanting to snoop his phone more and we talked about it and he has regrets too nut every time I see him get a notification I just want to see what it is

How do I work threw this feeling? I dont want trust issues with him so how do I get over this issue I have? Hes super understanding he knows he f'd up but we worked threw it