Do you have PTSD from something that happened a long time ago?

A healthy fear of heights that motivates you to take appropriate protective measures is a good thing.

OTOH, a crippling fear of heights that leaves you frozen in terror and unable to function in situations that are objectively safe is maladaptive.

As for the OP’s question…my answer is yes:

My crash happened on a highway on-ramp not far from my home. I struggled with PTSD for a couple of years after that, and while I’m mostly fine now, I do still get uncomfortable when I go down that particular on-ramp - especially in the rain. It makes me go slower there than other folks would, and I don’t have that same unease on other highway on-ramps.