I rolled over suddenly in bed one night and suddenly got vertigo. the room was literally spinning like a top. i was very unwell for about 3 days.

BPV: Sounds like benign positional vertigo. https://patient.info/health/benign-paroxysmal-positional-vertigo-leaflet

Bppv : Benign paroxysmal vertigo is common and lasts for several days at a time. Can take medications and do exercises. Your GP may also be able (depending on facilities) to do a particle reposition manoeuvre which I've personally found can be helpful for some

Likely BPV: Vertigo with change of position is often a sign of benign positional vertigo. If episodes continue at increased frequency or severity, recommend speaking to your doctor.