Not enough information....not nearly enough.
How old are you?
Are you taking any medication for any pre-existing underlying medical condition?
Just confirm that during the day, even with constant movements of the head, you do not have any attacks, your only problem is when you wake up in the morning.
Do you get any deafness or wringing in the ears during your attack?
Until my question are answered, it certainly doesn't sound like BPPV or Meniere's disease and at the moment doesn't sound "a big deal."
I would rush to the GP,s at the moment, but look forward to your answers.