Hi there ~
I understand your concerns. I am glad that you stopped using marijuana. Though there is not an identified symptom list for withdrawals from that substance, various people have reported symptoms similar to yours and there have been case reports of death from the substance as well. I believe that you should visit with and consult a psychiatrist
to find out the right medication for you. I believe exercise is good for health, however the symptoms seem ominous and you need medical attention. So please visit with and consult a local doctor who can redirect you to the right resources as soon as possible.
I hope this helps. Take care and have a lovely day!