Watergypsy, I agree with Maryjane - it sounds like benign proximal positional. I've had it myself, and was misdiagnosed for several months until I saw an Ear, Nose & Throat specialist. They referred me to a physical therapist who performed the Epley Maneuver on me and it worked! I did a few exercises at home afterward, but I haven't had vertigo since (about a year ago).
It might be worth talking to your GP about this.