You can search public records in your county to see if H filed. I wish I had remembered that when I had my freak out earlier this week!!! But if your spouse has filed papers, first thing that will happen is it'd be registered with the courts and you'd see it online. Will NOT see if spouse has simply had consult with atty.
You need to protect yourself either way so getting info from atty is the only way to do that. Plus it checks off one box in moving you through your situation and can put your mind at ease knowing your options.
Best thing to do is put it out of your mind as much as possible. If he files, if he didn't - wouldn't change your course of action, would it?
