On Friday I have to take a Complete Metabolic Panel w/EGFR (Not completely sure what that means). Will they test for marijuana? I smoked marijuana for the last time on Thursday (September 27, 2011) and I'm wondering if it will show up in the test. I'm not a complete habitual smoker, just about 2 to 3 times a week. Should I postpone my test? Also, wondering if cigarettes show up. Have only had one drag off of a cigarette in the past week. Thank you so much!