Cheating on me?

So yesterday when I got off work my boyfriend called me telling me that he left his phone at home and needed me to bring it to him. So I took advantage and went through it for the first time ever. We’ve been dating for 4 years. This month is actually our anniversary. I went through his phone and found some things that seriously concern me.

1. He is messaging some girl talking about me and he keeps asking her why she’s not married. They’re flirting HARD.

2. He’s Been on his internet looking up cures for genital herpes. There’s a link to a doctor that prescribed medicine to cure it. ( we haven’t had sex since my birthday March 22.)

3. I think he may secretly be gay? He’s been watching some weird porn and it’s making me worried that this is why he’s looking up genital herpes. And I’m scared that he’s been cheating on me and caught something and that is why he won’t have sex with me? Some please try to calm my mind. I’m so upset. Scared. Need some advice