When I treat BPPV at work I usually do one Epley, then get the patient to start the Brandt Daroff exercises 48 hrs after that.
We recommend the Brandt-Daroff exercises 3x per day, building up to 5 reps per side. Start with 2-3 reps per side and stay down until your symptoms stop. We get the pt to do the exercises for 7 days, or for 2 days after vertigo symptoms cease.
an interesting website with some nice diagrams is:
BPPV -- BENIGN PAROXYSMAL POSITIONAL VERTIGO
I would ignore the surgical bit etc as this shouldn't apply to you and I have never seen a patient who has had surgery for BPPV.
Are your symptoms still short duration (<1 minute) positional (triggered by particular movements) vertigo? The caloric testing and ENT opinion will further evaluate your vestibular system. I agree as well that you can sleep how you like.