No, you’re not the youngest, we’ve had some members who are parents to teens diagnosed with ES. One of the Mum’s wrote a book about her son’s experience, I’m not sure how old he was but his styloids did grow back so he had to have two lots of surgery, here’s a link:
What do you know about Dr. Newman at Penn? - General - Living with Eagle
But we do find more members are older, we think it’s possibly because although they might have had elongated styloid processes for years, as our bodies age and connective tissues aren’t as tight, it could shift the structures in the neck enough to start to cause more symptoms- the neck is such a tight space with major blood vessels and cranial nerves there, that a shift of even a few millimetres could be enough to bring the styloids into contact with them.
If your dentist recommended the doctor you’re seeing then hopefully she’ll be helpful 
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