<human>: Can you summarize the given text in a few sentences?

Well, I'll (F28) start off by saying that he's my fiance (M29) and we've been together for three years (engaged for six months).  

I was doing the laundry this morning and was making sure he didn't have anything in his pockets before throwing his jeans into the washer.  That's when I found a crumbled up piece of paper with a cell phone number on it and the name, "Lauren."  

I immediately went into our bedroom and woke him up because it was 7 AM and he was still sleeping.  I asked him about it and he said the waitress gave it to him and that he forgot to throw it away.  I won't lie, I was kind of hysterical about it and crying.  He told me he'd never cheat on me and that he loved me.

He went out with the guys last night and didn't come home until 2 AM.  Plus, he was completely drunk, which is unlike him.  He's never gotten drunk in the three years I've known him.  I'm so worried that he cheated or was going to cheat.

I haven't told my friends about this and I don't intend to.  Which is why I'm posting this here.... To get everything off my chest.  What do I do?  I've never been in a situation like this before.
<bot>: I'm afraid my fiance's cheating or was going to cheat.  I don't know if I'm freaking out over nothing or what's going on.