Why do people say, “under the weather”?

Since I myself am under the weather, I looked it up:

“To feel ill. Originally it meant to feel seasick or to be adversely affected by bad weather. The term is correctly ‘under the weather bow’ which is a gloomy prospect; the weather bow is the side upon which all the rotten weather is blowing.”

I’m not seasick, just a bad cold that hit on New Year’s Eve. Every few years I get really sick, but hoping this isn’t one of those times… And hoping to feel better by tomorrow. Missing work makes me anxious. All I’ve done today is stay in bed, sleeping and listless. We ordered delivery for dinner, and usually Hot & Sour Soup is a good cure, but this was terrible Hot & Sour Soup.  (Our quest for good Chinese delivery in our new town is still ongoing.) Also, I can never remember if it’s “Feed a fever, starve a cold” or vice versa. Either way, it’s starved thanks to that soup.

It’s kind of a crappy way to start the new year, but things can only go up from here, right? Right.