Jeandavid -
It's tempting to rush through the program because you want to feel relief so badly! As Ashley said, the homework is really the key to the program, and that takes time.
I went ahead with some of the auxiliary sessions on relaxation and worry while working through the program, but I didn't have real success until I worked through everything one step at a time.
Hang in there, keep at it, and reach out to everyone in the forum for support - this is a very helpful place!
Teebs