I have never smoked before in my life, my boyfriend persuaded me to take one hit and we passed it back and forth, I'm not even sure I was doing it right and I didn't hold it in long and didn't feel any of its effects... today I took a hair follicle drug test for a new job.. do I have a chance or will I fail miserbly?

One time use of marijuana is not going to be detectable on a hair drug test.

“In contrast to other illicit drugs, hair analysis lacks the sensitivity to act as a detector for cannabinoids” .”

Musshoff F, Madea B. (2006) Review of biologic matrices (urine, blood, hair) as indicators of recent or ongoing cannabis use (http://www.ncbi.nlm.nih.gov/pubmed/16628124). There Drug Monit. Apr 2006;28(2):155-63 also see

Genen & Bienenfeld, Cannabis Compound Abuse Workup (http://emedicine.medscape.com/article/286661-workup)

Galanter & Kleber, 2011 Psychotherapy for the Treatment of Substance Abuse (http://books.google.com/books?id=NEWpRlwUAmcC&pg=PA58&lpg=PA58&dq=marijuana+incorporation+into+hair&source=bl&ots=vEelAPWmux&sig=7I9Z-DIiT0tv_2eg6X2fz7NSeA4&hl=en&ei=5oTiTsTlOIv22AXV5smyBA&sa=X&oi=book_result&ct=result&resnum=9&ved=0CHMQ6AEwCDgU#v=onepage&q=marijuana%20incorporation%20into%20hair&f=false), American Psychiatric Publishing, Wash, DC, p. 58 quoting “Positive results from hair testing are generally expected only when a person has used a drug at least four to six times per month” [This applies to drugs in general and not just THC]