Hi I ve recently had flu like symptoms for nearly a month with an initial severe cough producing lots of phlegm. However antibitrcleared the cough up but not the fever, chills etc. A week into recovery i smoked a cigarette and all my symptoms reoccured. Now i feel like like my chest is super tight and in pain for the last 4 days and heavily inflamed and keep getting muscle aches at night particularly in my shoulders and legs. What could this be?