You probably just built up some good sense!

When I was a kid, I was always rushing to climb things and then I'd panic and say "Help! I can't get down!" I don't seem to have quite shaken that habit...

Seriously though, learning to climb and doing bouldering has really built up my confidence on the rocks. Vertigo is not a bad thing to have because it stops you doing daft things, but learning to climb properly and building up the right leg muscles makes you more secure.