I threw up every week before the appointment for the first 2-3 years. Now it does not happen every week any more - just sometimes. I do get a huge rushing in my head and pounding that is so loud that I can't hear and sometimes I go to speak and sound does not come out.
I would not approach it like asking for a light session but rather just that a light session was going to occur. I would not want the therapist thinking it was their choice rather than mine.