I wouldn’t say I’m accident prone.

But it’s no surprise things happen to me that make for great Facebook status updates.

Like getting my wallet stolen in Athens. Or getting a serious staph infection after surfing in Tavarua, Fiji. Or suffering through a urinary tract infection on a flight to Hamburg. (The Germans have the best medicine, let me tell you!)

So why wouldn’t I get a concussion on a recent kayak trip to the Mokulua Islands in Kailua?

Here’s the story: We met up with some friends this past Sunday to kayak to the iconic twin islands off Lanikai Beach on the windward side of O‘ahu. The plan was to walk around Moku Nui, the larger of the two and the only one the public can legally land on.

The backside of the island can be dangerous to traverse, and I wouldn’t recommend people venture there.

An unofficial warning sign posted toward the back of Moku Nui.

But of course, I never listen to my own advice. I’ve been back there (see above) a couple of times before without any incident. There’s a protected cove into which adventure-seekers like to jump from the rocks overhead. And there’s also a shallow saltwater bath — into which adventure-seekers like to jump from the rocks overhead.

I don’t jump into anything, so that’s not where I hit my head.

In fact, it was on my way around the island when I sustained this concussion that doesn’t seem to go away.

I followed my friends’ two teenagers into a sea cave and a wave pushed me against the side of a rock wall, full force, and I whacked my right cranium pretty hard.

At first I panicked, thinking I was going to start bleeding profusely. And the ocean is the last place I’d like to be with an open wound to my head and blood gushing everywhere.

So I quickly got out of the water and onto land.

And to be honest, save for a headache, I felt fine.

In fact, I felt fine up until that night, when I sipped a glass of moscato and started slurring. Then I went into the bathroom, switched on the lights, and everything got so bright, I thought the roof had been torn from the house and the sunlight was streaming in. I couldn’t open my eyes.

When I told my husband about this strange phenomenon — I was actually tripping out about the suddenly bright bathroom more than thinking this could be neurological damage — he started asking me a bunch of questions.

“Do you have a headache?”

“Are you nauseous?”

“Are you dizzy?”

“Do you have any weakness or numbness in your arms?”

To all of these questions I answered yes.

“I think you have a concussion.”

OK, so I’ve heard about concussions. Football players, boxers and car accident victims get them. You have to really hit your head pretty hard, I thought, to sustain something like that.

Turns out, millions of Americans have suffered from a concussion, many unreported. More than 300,000 sports-related concussions occur annually in the U.S., according to the University of Pittsburgh’s Brain Trauma Research Center.

A concussion is a type of traumatic brain injury caused by a bump, blow, or jolt to the head that can change the way your brain normally works. And you don’t have to actually hit your head to get one. A violent shake can cause a concussion, too.

Effects are usually temporary and include headaches and problems with concentration, memory, balance and coordination.

On Monday, I was really starting to feel the effects. I had a difficult time concentrating, I would forget what I was saying mid-sentence, I felt dizzy and nauseous all the time. Light hurt my eyes and I was still suffering from what was starting to feel like a migraine. It wasn’t fun.

By Tuesday I was at the doctor’s office, getting my eyes checked and my brain scanned. No blood clots, but I definitely had a concussion that the doctor said may take weeks to months to heal fully.

This is Day 5, and I already see an improvement, at least in my concentration and balance. (It would take me twice as long to type an email, for example. It literally hurt to think.) But this injury is no joke.

Friends kept reminding of me actress Natasha Richardson, who, back in 2009, sustained a head injury when she fell while taking a beginner skiing lesson at a resort in Canada. She seemed fine, talked and acted normally — then died the next day.

I feel like if I’ve survived this long, I’m in the clear.

But I won’t be swimming into any sea caves anytime soon.