Dizziness

Anyone else get random bouts of dizziness? It's happened to me four times in the last month. First time, I had just parked my car at work. Second time, I was sitting in a restaurant with friends. Third time, I was making out with my SO. Fourth time was just now, while standing in the kitchen talking to my roommate. 
My mother and maternal grandfather both get vertigo. 
I know for a fact that I don't drink enough water. I'm on generic Ortho Tri-Cyclen. I'm just nervous 😞