Hi. I had gone through your query. Marijuana contain cannabis. It can be detected up to 72 hours to 1 week in normal users. In chronic users it can be detected more than a week. So if you had this since January then it can be detected up to 1week. Better to avoid marijuana as you are younger and it will affect your physical and psychological health. Better to avoid for better health. Thank you. I hope i have answered your query.