In a lot of cases the drugs alone will only help for a short time. It is still a constant battle in your head.
I have been on almost every kind of anti-D out there but although they surpress feelings of doom, they are not a cure.
My head and a lot of people that have depression have trouble catching and concentrating there thoughts. The inside of my head in like the screen of the stock exchange 24 hrs a day. Its a battle I know I'm not alone in. Except it as part of you and control it. Although it can be tiring, it does not have to be a bad thing. It just takes mind control, maybe drugs and therapy if it gets really bad.
Don't ever be ashamed of it --- some people think its a blessing. Those types of people really understand how powerful the mind can be. And remember you are never alone in the way you are thinking.