Do I have a reasonable chance of passing my drug screening?

You have chance but detection time can vary in each organism, so if I tell you that you will pass probably this will be a lie. My advice is to go and buy one single panel THC kit and home test yourself. If you pass this one you will probably pass the Lab test also. Do not take any drugs prior the test, try to keep your body well hydrated, eat more fruits and veg instead of fatty food. But stop drinking water the day prior the test because it can dilute your sample and the lab will understand that you are trying to hide something. From more than a year I am using one site - drugtestfriend.com for my drug tests. They will give you for cheap one formula. I used it more than 4 time 3 for urine one for hair test and I was always fine. Also at that site there is one free consultation number, call it and the consultant will tell you exactly what to do and do you need to buy this formula or you will be fine only with natural detoxication.