I was freaked as well, but I did a ton of research and figured out the truth. I recommend this article, it does an excellent job of surveying studies on the topic. The ultimate conclusion is that even for chronic users you are unlikely to test positive after 10 days.
https://www.ndci.org/wp-content/uploads/THC_Detection_Window_0.pdf
This is another good study. It is fairly technical, but the tl;dr is that they took a bunch of people and watched them for four weeks. They were tested at the start and the level of drug metabolites in their urine was measured. They were then divided into three groups (low metabolite amount, middle amount, high amount). If you look at figure 2 in the article, the low/middle level subjects were all clean in days. The high drug metabolite subjects still tested positive after 28 days, but that is because they were measuring drug metabolites down to the 15 ng/ml level. The initial test level is almost always 50 ng/ml (even the initial DOT test is 50), and if you look at figure 2, even the heaviest stoners in the study were below 50 ng/ml within 20 days:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2587336/
You're good. Just don't smoke again until you start.