I don't know how much longer I can take this.

So recently I went to get my husbands phone from him to put it up so we could detach from our phones and spend some quality time together, AND HE FLIPPED HIS SHIT. Like jumped up and snatched it away shoving me (not hard, more of a nudge) down onto the couch and he stood above me with his screen turned away. I asked him what he was doing? He told me he wanted to show me something. So I stood up and saw he was on his instagram dms. So I was like well what did you want to show me, and he told me he couldn't find it. The way he reacted made me skeptical, so I asked to see his phone. He handed it to me and I clicked his Snapchat. Saw a few names, then he snatched it back. I told him I wasn't done so he handed it back to me and I saw a msg to a girl was deleted on his snap. He said it was nothing he just knew I didn't like her and didn't want me mad. But I don't even know her. I'm currently 5 months pregnant and battling my depression. I've had it under control really well but now that my dad is getting sent to Iraq for 9 months and then Afghanistan for a consecutive 9 month tour 2 months before I am due to deliver is hard on me. I'm usually not one to care about phones but last time my depression had flared with my grandmothers passing I found out my husband had confided in other women for affection and comfort. It was only msgs and no real contact with them, but it still hurt. I understand he felt unloved but I was planning her funeral... I blamed it on my depression and moved on. But now this...while I'm pregnant. Should I chalk it up to my depression again? Or bring it up to him. I just don't want my disease to be the reason my daughters family is broken.