I would suggest that you set up a good intel ("snooping") system, and then leave your "tracking him down" communications with your husband completely out of your intel loop.
I had a GPS-enabled phone hidden in my wife's trunk that would send me e-mail alerts on my BlackBerry if her car got within 100 yards of OM's house or the hook-up house (friend of OM) they'd been using), as well as her place of work, so I'd know if she was really there or not.
Then I went about my life.
Your "stalking" behavior is only driving yourself batty, and -- more importantly -- making you LESS attractive in your husband's eyes. There's nothing wrong with a good intel system to verify a wayward spouse's compliance with agreed-upon "no-contact," but calling and texting constantly isn't the way to do it.
