Devastated

This morning I asked my boyfriend to see his phone and when I went through his phone I saw his Instagram DMs and he wrote to one of his homegirls insta story of one of her friends the tongue emoji like this “ 👅👅👅👅” and then the girl wrote back sorry bro she live in ATL and he wrote the side eye emoji “ 😒” like he was blown that the girl wasn’t in the same state as him then to make matters worst I’m 5 months pregnant this is embarrassing we’re having a gender reveal this Sunday and I’m debating if I even want to have it anymore. How can I come out with my pregnancy with him knowing he’s out here worried about other females my heart is broken and I can’t stop crying. What should i do ? Or how should I handle things ?