Can Infrequent Drug Usage Be Detected In Hair Follicle Test?

I may have a hair follicle test looming soon for a job. I smoked two small bowls about a month ago (with 4 other people not just myself, so I d say that equated approximately 6 to 9 hits total). Before that I last smoked around Christmas day. That time was significantly less (only 3 hits or so.) Before that it had been at least 4 months since I had smoked anything. I m just trying to gain as much peace of mind as possible. I have read over and over that infrequent drug use does not normally get detected in a hair follicle test. Does my situation fit under that category, or should I be worried?