Woke up, got out of bed and couldn't walk in a straight line. Any idea as to why?

I am thinking low blood pressure? This has never happened to me before.

I woke up this morning, and after a few minutes, got out of bed. When I started walking, I had no control over my legs. I walked right into my closet door. Then I turned my body, started walking and walked into my bed instead of out the bedroom door. I didn’t feel dizzy at all, just had no control over where I was going. I finally had to kneel down for a few minutes. Then I was fine.

Very odd.