I went through my SO phone 💔😰

To make the long story short.....went through his most recent history and found a few FB messages from girls & he was flirting with them. BUT to put the cherry on top I found a bunch of personal Craigslist adds, not any "personal" adds but it was "T4M" = Tranny 4 Male. I'm in complete shock. He's the love of my life and I'm currently 37 weeks pregnant. I feel like my whole world was turned upside down. I've lost all my trust in him. Idk what to do😰😰😰 breakup and move back home or stay with him and pretend nothing happened? 😔😔😡😟😭😭😭