Not sure if this kind of post is allowed here but idk where else to go but I’ve had suspicions my gf is cheating on me and I need some advice. Firstly, Found a condom in her room when we first started dating and I’m fairly certain it wasn’t mine but she convinced me otherwise. Secondly, she wouldn’t let me go down on her the other night because she “was on her period” but the next night and 3 days before it was totally fine so I was suspecting maybe she fucked someone and did not want me to find out? I don’t know what to do and I need another guys advice. I can’t ask my friends due to the embarrassment. Help me out please.