The first thing you may try is to simply look in the phonebook. Look for people who list their specialty as PTSD or as general anxiety. Then call them up and ask the receptionist to talk about the therapist a bit. See if you like what is being said.
Another avenue is to go to an office that has several therapists in it. In these offices they generally will screen you to see which counselor they think you will work best with. These has some nice benefits and you have to be “screened” in every setting anyhow.
The next thing you will want to look at is what style of therapy is being used. There are several styles. After you read up on them a bit you may find that some speak to you more and some don’t sound like a good fit. Before you schedule with a therapist ask them what style they use. Here is a site to get you started on that:
http://www.findingstone.com/services/typesoftherapy.htm
Other than that realize that you can always change therapists. If after 2–3 (give it more than 1) meetings you aren’t connecting with your therapist you may choose to try someone else. Be self-critical though. Some people decide they don’t like their therapist simply to avoid the hard work of therapy and often we do that subconsciously. Also keep in mind the first meeting or two is usually quite different from the actual therapy. The first meeting is typically a type of screening and then next is more of a get-to-know-ya type meeting (not always in that order). After that the work will start.
On second thought another thing you may want to consider is if you want someone who is more assertive in their therapy technique or more passive/gentle in their therapy technique. Both can be very effective. This is another question you may ask about before setting an appointment.
Oh and if we are being practical you may take into account cost as well. Some therapy can be quite costly and others can be on a sliding-scale fee. For you this may not be an issue but keep in mind there are low-cost alternatives just in case it is.
I was in a scary car accident as well. I hit a cement divider and totaled my car. I was alone with no cell phone. It was so scary. I still have anxiety whenever myself (or anyone else who is driving me somewhere) drives by one of those cement dividers.