She should go the hospital since she is having the pains. I wouldn't be able to tell you for sure if she is miscarrying but they would be able to do a sono at the hopsital. And the bleeding should be checked out. Good Luck to you.
Unfortunately there is nothing that you or your wife can do. She needs to relax and try to stay calm. If it is the worst case scenario nothing that you do now will help. Hopefully that is not the case, if the bleeding has stopped or there was only small spotting to begin with, that is a really good sign.
Comfort her and show her lots of love and support. I'm sure she is terrified. Will be thinking of you both.