Urgent Jerry G Help Needed

Just got the call that I have to take a hair follicle test for a new job by Saturday.

Here's the relevant stats:

Last toked May 31st. Before that I was a 3 or 4 hits a night smoker for about a year. I took a 2 week break from anything in April. MMJ quality stuff. I'll have 43 days clean by the time I go in on Sat.

I cut my hair on July 1st with a #1 clipper. It was down to maybe 1/8 of an inch or so. It's currently right about 3/4 of an inch.

No hair on my underarms or chest (or at least not enough to test). If they don't go for my head, my guess is the legs?

Prior to this I was doing baking soda treatments. Usually just slapping some paste on my head and letting it sit for 1/2 hour or so. I've also been shampooing with PM III every day since I shaved my head.

Can I Jerry G twice between now and then or am I going to burn my skin off?

I was thinking maybe once today and once on Sat before I head to the testing center.

Because I don't know if they'll go with what's on my head, should I Jerry G them both (head and legs)?

Should I cut my head hair back down again and force them to go for the legs?

I have already ordered (yesterday before I found out - thought I was being proactive) Toxin Wash and Zydot but it looks like the Zydot won't arrive until Friday and the Toxin Wash might arrive Friday but more likely Monday (which does me absolutely no good).

What are my chances of passing this? I'm freaking out!