Thanks for choosing health care magic for posting your query.
I have gone through your question in detail and I can understand what you are going through.
One time exposure to cannabis cannot stay for this long. If you say your heart rate
is more at 85 then probably its your anxiety
about the exposure to cannabis that is causing it. You should go in for cognitive behavioural therapy.these people will address your distorted thoughts and bring down your anxiety.
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.