The best way is to go buy a THC drug test from your local pharmacy for about $20 and test yourself with first morning urine. Since you are taking time to cleaning up you can order THC test strips (very accurate) for about $2 each on ebay. Generally you can get them to your home in about 4 days. Then you will be able to afford to test yourself about every 2-3 days till you test negative. Good luck.