Rant/advice

So I have been with my OH for almost 10 years. Expecting our first little one any day now. I love him with all my heart and more importantly, I trust him too. So today I had to log into his emails to get something I know was sent there (I told him I was going to beforehand) I log in to find emails back and forth to random women asking for pics, telling them where we live (!!!) so they could meet up and 'have fun', could he 'book them'.... now these are as recent as 4 days ago. I call my OH and calmly find out what the fuck was going on... he tells me it's people at his work going on his phone and messaging people. This has happened before. Normally I'm OK with it, the guys at his work are massive dicks and have tried to break us up for years now, and like I say, I trust him completely, but it feels different this time? Like I'm less than a week from my DD, could I just be super hormonal or is it time I questioned a little deeper?

Sorry for the long post. Don't expect anyone to read, just good to get it written down x x

EDIT: I have proof that the times before were his so called friends, so I believe that, and as such I believe it could happen again! My problem is I don't have proof this time...