Hair Drug Test????

I smoked weed about 3 times withing a 3 week period about a month ago. I have never smoked before then. And i didnt really smoke to much at those times either. Just a hit each time. I got a new job and they did a hair test. Is there any hope at all i will pass? And do you think if there are low amounts or if they see i have never done it before then that they will still hire me? I cant believe i messed this up but im so nervous and im just going crazy. This job means everything to me, if i dont get it a lot of things will go wrong. And i have been waiting on it since september. i really really need it. What do you guys think???
I have worked in Pathology and I can't tellyou what will happen. But I would be surprised if it picked it up. If you smoked as much asa you say I don't think you have anything to worry about. I imagine the levels to be so low it would be hard to detect anything maybe you could say someone smoked one around you and you want another test repeated if there was a probelm. I think you will be fine. The THC testing is pretty new over the years so I wouldn't worry too much. Good Luck