Lol clickbait title

Nothing's seriously wrong with me

HOWEVER

They discovered I have a Vitamin D deficiency

It's very common in Michigan because we don't get any sun here. Alexis was actually diagnosed with it a while ago, so they decided to check me and Michelle

And we're both deficient

My question is why did it take them 18 years to discover this? Have I had this for a while or did my vitamin D levels randomly drop down and coincidentally it happened to all three of us at the same time?

The second scenario just doesn't seem very likely to me