Hi, I'd like to help you with your question.
Anxiety is very easy to treat. Your wife only has to want treatment and she can reduce or eliminate her anxiety. She can do this through both therapy and self help.
Most anxiety is easily treated through once a week outpatient therapy. The best therapy for anxiety right now is Cognative Behavioral Therapy (CBT). There is also a newer therapy called Integrated therapy that helps as well. But even if she cannot find a therapist who does these therapies, any therapist with a Master's Degree or Ph.D can help. If she chooses to see a Master's level therapist, she can see anyone with a M.Ed, M.A., MSW or LSW after their name. For a PhD, that is a therapist who earned a doctorate in the field of psychology. Neither a Master's or PhD level therapist can prescribe medications. A Psychiatrist, which is a medical doctor who specialized in psychiatry, can prescribe. They also can see patients as well but for the most part, they see patients for medications.
To find a therapist, your wife can ask her doctor for a referral. Or she can search on line at http://therapists.psychologytoday.com/rms/.
There are also numerous resources on line and through books. Anxiety is very common, so the variety of resources available is widespread. Here are some resources to help her get started:
The Anxiety and Phobia Workbook (Anxiety & Phobia Workbook) by Edmund J. Bourne
When Panic Attacks: The New, Drug-Free Anxiety Therapy That Can Change Your Life by David D. Burns
The Cognitive Behavioral Workbook for Anxiety: A Step-by-Step Program by Bill Knaus Ed.D. and Jon Carlson Psy.D. Ed.D.
You can find these books on Amazon.com or your local library may have them for you.
Your wife could also work with someone here on Just Answer. Experts sometimes work with someone to help them through a tough time. She can either request an expert or she can work with whoever answers her question. This helps because most experts can be more available than a conventional therapist can be to offer her reassurance, so when she cannot see her therapist, she can talk to the expert she is working with.
You can help her by reassuring her that she will be ok. Anxiety makes a person fearful of losing control so hearing that she is fine is reassuring. Also, help her by finding her resources and going over them with her or linking her to them, such as her doctor and therapist. The more support you can offer, the more she will feel calmer. Also, talk to her about taking medications initially. Because she feels her anxiety is severe, she may need a mild medication to help her cope. But the medication should only be temporary. Anxiety cannot be cured by medication. Only therapy and self help can do that.
Also, do not forget to care for yourself. You are going to be taking care of your wife for a bit and it is easy to get burned out. Take breaks and get out for a while if you need to. And if you feel too overwhelmed, talk to a therapist yourself.
I hope this has helped,