Hot Topic: Catch Him Cheating

My husband and I have only had sex twice in about three months.  The other day, he was wearing a more dressy shirt than he usually wears to work, and today, a shirt he nevers wore to work that shows off his arm muscles.  He called me by a name that is someone he may have met at his corporation who shares the same nationality as he does.  A friend from my work was sure they had seen him in a car not like ours, driving it.  He has started bringing his GPS to work.

On the other hand, I've always been a little paranoid and jealous.  The name he called me may have just been mixing up two words he was saying, as it's not a common name.  The lack of sex may be a combination of his lesser attraction to me since I've recently gained a lot of weight, and my self-consciousness about it that has made sex awkward.

Should I worry, or am I just being crazy?