Removing extremely stubborn fragrances from hair?

Unsure if this was an oil diffuser or a timed air freshener, but my vet has a very strong fragrance throughout her office that has clung to all of my clothes and hair. I have taken 3 showers, used excessive amounts of soap, doused my hair in multiple rounds of isopropyl alcohol, used olive oil during one of the showers, and applied multiple rounds of witch hazel, and my hair is still holding on to the smell. I'm getting increasingly sick from it and am completely out of ideas. I don't think there's any natural oil left on my hair at this point, and frankly I'm about to break down and shave myself bald. Any suggestions are much appreciated