Oh dear you and I sound the same,but for me i have never had the problem before, maybe it was because i was nervous, but i was not as bad as i could have been, because i knew i was getting the intravenous, i had it 15 yrs ago,no problem at all,yes it certainly puts you off having needles,she said my veins were very thin, well first time i have been told that.

Good luck with your crown, i feel for you i do.