Hey after giving up cigis and recreational use of marijuana I started having chest pains, insomnia and more recently back discomfort accompanied by tingling / numb limbs .. I have been smoke free since 1st January 2012 so I am sure its not withdrawals, I have also been to my doctors 3 times now and each time he said it was nothing, I have had an ECG which came back clear and blood test that came back clear.. Can anyone help me?