Your therapist does not sound like much help there. Exposure Therapy is based on the following principles:
- Graded (step by step, starting at step 1 and not jumping to step 4 etc)
- Repeated (for...

Is your CBT suggesting that you watch any videos of purging? Or watching these with you? Have your practiced making "purging sounds"? Keeping an eye on this thread - sounds like you have made a lot...