OMG on the IV! I am so sorry!
That sounds just terrible. I cannot even imagine. I pray the next one is without incident.
It's ok to say up front that you need the best most experienced person. You can also ask that they use the "freezy" spray. Ethylene Glycol. It momentarily freezes the skin without damaging it and you can hardly feel a thing. The oral surgeon my son and I have both visited uses it and Wow was it a lot easier.
Maybe some Vit C to keep free radicals and resulting inflammation down?
I hope you heal up soon!