Congratulations! You did something incredible for your body and mind - you stopped inhaling toxins. It seems like your body is trying to clear itself out - hence the clear phlegm. Try to see a doc - apply for low cost health insurance or go to a walk in urgent care clinic which would be cheaper than an ER bill. I hope it is just your body clearing itself out. Hope you feel better soon.
Sounds like you have developed asthma. Because you occasionally cough up blood, you should be tested for tuberculosis. Your doctor will probably prescribe albuteral or other anti-asthmatic drugs to help you with the phlegm and cough. I hope you don't have TB, but it is not unheard of. If you do have it you might be hospitalized for a while and you will have to take the special drugs to combat it - for months.
You should go to the doctor to be checked out because if you stpped cold turkey it can be something More serious then you might think