Hi new wife,
This must have come as a terrible shock for you - allow yourself time to absorb the facts and like others have suggested read as much as you can on the subject.
I find this place (and also counselling) a huge help in processing everything that comes with being married to an addict.
I discovered my AH's problem 13 months after we married, spent the next few years trying to fix it all up and get us back on track...
Now, we've been officially separated 6 months - have another 6 until I can begin divorce proceedings - very difficult but easier than a lifetime of living with an addict from what I've read and heard - very best wishes to you