A movie made me stop trusting my husband

I recently watched a movie which featured a kind, loving and understanding husband.

To him there was nothing in the world above his wife and children. Even her friends envied her and would often wish to be in her shoes.

However, the perfect husband would do nasty staff behind his wife's back; he was the total opposite of what he seemed.

He would con, cheat and sleep around with many women.

I cannot stop thinking about the man in the movie because his good side is like my husband's. I am scared he may be pretending like the man in the movie.

I even dreamt my husband cheating on me.

However, deep down in my heart I know my husband is a good man. But I can't  stop thinking about what happened in the movie

What should I do?

Linda