Hi and welcome to Healthcare Magic. Thanks for your question...
Your ear pain
may or may not be related to the cannabis use, but you should get it checked anyway to rule out any ear infections or inflamation or impacted wax. The earlier ear problems are detected, the easier they are to treat. If left unattended, they may progress to chronic infections and problems. So please see a doctor and get yourself examined.
Wish you all the best.
- Dr. Jonas Sundarakumar