Ping a hair follicle test?

I took one hit nearly two months ago. Maybe another hot 2 weeks before that. I have a follicle test coming up in 3 weeks. Great job, and by great I mean once in a lifetime, of course. Smoke very rarely, prob 20 times in my 30 years of life. I'm 6'7, 300lbs, pretty well built. Use to be in great shape but metabolism has slowed since then. Have worked out approx. 2-3 times a week since. Any full time tokers have any advice?