hi, i have been ill for about 2 weeks with a flu, and i started having pains in my right lung, i thought it may be a chest infection so have been pon antibiotics, after 6 days though the pain is still unbearable...it feels like i have sprained a lung, or trapped some muscle in the ribs or something, when i use my left arm it hurts but it doesnt hurt to breathe - only if i take a big breathe