Question About Post Traumatic Stress Disorder.? I know that this is not a medical community but perhaps someone here will have information on this for me.  Opinions are also helpful.

10 years ago my b/f was in a car accident with 2 friends and he was the only survivor. Although he was not the driver in the accident he has suffered from PTSD and completely stopped driving. Since that time he has tried driving a few times but each time he tries he has so much stress that he vomits afterward (sorry for being gross) and does not look forward to trying again. 

Now he has just started an awesome job and is very excited.  We both agree that with the field he is working in it would be very good for him to be able to drive again. 

So last week he started his new job driving on his own, about 20 min. each way but is having a hard time - getting sick and stressed.

Its only been 8 days but I'm worried that this is hurting him more than helping him. Has anyone dealt with this? Do you think he might get better?  What should he do?

Summarized question: What resources are available for people confronting their PTSD?