I hope you still don't use regularly? There is a reason cannabis is an illegal drug, it contains 4 times more tar (cancerous material) than tobacco, and it is worse for your respirator system because it is smoked with no filter. "it has no effect on me" is a naive reason to continue, the effects of cannabis, just like smoking, aren't usually seen for many years, or until your lying on a
hospital bed with lung cancer and chronic asthma/coughing fits.