High Anxiety?

I really am at my witts end. I am so frustrated lately because my wife is having those damned anxiety attacks again. She is currently taking lorazapam and it has been helping but as of late she is having to double the dosage. Every thing seems fine untill round about sundown. Thats when she starts to feel them coming on. I know what they are like but When you are not the one having them it is hard to deal with because I just feel so helpless as to what to do. Actually there really isn't anything anyone can do that makes them any less severe. So I usually wait till she has taken the second lorazapam and then I leave the room untill she starts to feel better. Because If I stay in the room I begin to get short tempered with her and that makes things worse. Every time she sees a doctor and describes what she goes through, they just prescribe another pill that works for a while but then loses effectivness. I think the source of a lot of her anxiety is that she suffers from "cabin fever" because we don't have a car and she is dependent on her power scooter for mobility and that is limited as far as where she can take it, that and it only travels at 5 miles an hour. I really need to work on getting my license back and getting a vehicle. Then we will be able to go places and do things together again. Maybe that will help.