1. I have a couple of recs, although the hysterical/paranoid women in these were justified in their paranoia. So won't really fit if you're looking for unjustified paranoia.

Notorious might fit the bill. In this one the wife only marries the husband to infiltrate a potential ring of Nazis. Then the husband gets suspicious...

http://www.imdb.com/title/tt0038787/

Also, have you ever watched Laura? A police detective falls in love with a woman who's been murdered, while investigating her murder.

http://www.imdb.com/title/tt0037008/