How long will thc be in my system?

this has been on my mind for some time. first off im 6'5 290lb ( of fat) and i stoped smoking nearly 2 '1/2 months ago and at that time i was smoking 3 times a week ( about one bowl each time) so i on sat. ( jun 11) a and a little on sunday; i smoked with some friends. 4 friends spliting 2g's of higher quality stuff. so in the last three days ive been excersising for about 30 min every day (all my job will allow) and taking motab. boosters along with niacin ( just to help sweat). i would like to buy some detox drinks but idk which to get and i was wondering what my chances are on being clean by next week given the work outs, motab boosters and detox drink