Hi there ~
I understand your concerns. Yes, it is known that medical marijuana can reduce or ease post surgical pain. However there is a risk of pulmonary embolism
like you have mentioned which is a life threatening condition. I believe you need to consult your psychiatrist
before using marijuana in any form and if you are eligible for it, it would be preferable to use medical marijuana as instructed by your physician. I strongly recommend that you see a specialist in substance use disorders to determine the necessity of rehab in your case.
I hope this helps. Take care of yourself and have a lovely day!