I really shouldn't over react because I see other women seriously dealing with it. I just can't…

I really shouldn't over react because I see other women seriously dealing with it. I just can't fight the feeling that my husband is thinking about cheating. he'll go all day without texting me but he's texted done girl named Luna? she might just be a friend but why have I never heard of her? she doesn't work with him, I know all of them and it's a bunch of old men.