Hi there ~
I understand your concerns. There is no way you could get THC
out of your system to the point where it is not detectable unless you get a hemodialysis
to clear the THC out. Even then there is a slight chance of your being detected to have THC in your system. It usually takes about 2-5 months depending on the usage to get rid of THC from your system. The best way to deal with this is to get a quantitative analysis weekly (if this is for job reasons or for probation/parole) to prove that you have quit using marijuana. I hope this helps. Please consult a local psychiatrist
for more help.
I hope this helps. Take care and have a lovely day!