I have been sick for about 5 days with bad headache and slight cough, very little fever. While coughing last night, I got a strange feeling in my lungs.  It felt as there were hundreds of tiny needlles inside my lungs, both sides, kind of burning. Is this something I should be concerned about?
Thanks for asking your question completely understand your querying my opinion you have upper resp tract infection, infection is increasing to lower resp tract. Excessive coughing can cause that feeling of burning sensation in the chest. Mucous clearing and forceful cough can cause the same symptom you need to be started on broad spectrum antibiotics like lifetime and Multics like aerosol. You need to take consultation from a pulmonologist and get a chest X-ray done and discuss the above-mentioned treatment, so that he can prescribe as per his opinion. Thanks /regards feel free to ask more questions may god bless you with good health