What Causes Severe Dizziness?

I am a healthy 38 year woman. I take no medications. However, I woke up this morning with severe dizziness. I could not walk without holding on to something. Moving, laying down, closing my eyes, etc only made it worse. I thought it would clear up, however, at work it got worse. My right eyelid is now drooping. And the severe dizziness is making me miserable. I hate seeking medical care when it could just be a benign cause. Please advise as I have heard this could mean I am having a stroke .