will I pass my hair test?

Ok guys exactly 4 weeks ago I took about 3-4 from a joint. Now In a few days I'm going to be hair drug tested. I know these tests can go back about 90 days, so what are my chances of passing? I have only smoked weed a few times in my life. Another thing. I cut my hair but I can't remember if it was BEFORE I smoked or AFTER I smoked. But I know it was around the same time. Maybe if my hair was cut after I smoked my hair wont contain the chemicals? Does that tide and vinegar method really work? I heard it was BS. Please help me out guys!

Tanner

i passed my hair test and had smoked about a month before the test. however, i always keep my hair short/buzzed. i also shaved my head with a razor about 2 weeks beofre the test. if you havent cut your hair since youve smoked then theres a good chance you wont pass. not sure about the vinegar or tide thing. good luck.