I woke at 4:00 a.m. thinking about work. I considered getting up and working, but when I moved my head it felt odd, so I concluded that I wasn’t awake and went back to sleep.

When I got up, I still felt odd. My head felt like a balloon bobbing along in an unstable way when I moved. When I bent over I felt nauseated.

What is wrong with me? I don’t know. I looked up lightheadedness and dizziness, though neither word says exactly what I mean.

So then I looked for “I feel like my head is a balloon.”

To my surprise and consternation, I discovered that there are lots of web pages on this. They don’t mean what I mean. They seem to be complaining of pressure — a feeling as though a balloon is being blown up in their heads.

Dr. Google’s diagnosis? Stress, sinus pressure flu, stroke. BPV. Heart attack.

I hope it’s not stroke or heart disease.