Hi I missed 2 steps going down the stairs and hit hard landed on my right foot carrying a 6-7kg suitcase, a day after that hips and upper legs hurts , when to the Doctor and gave me an x ray and found nothing and gave me norgesic which helps abit. A week later went for CT scan, also results shows nothing , and the pain comes and go. Now I got the flu and when i sneez i feel the annoying sensation of mild pain and when i adjust my body to certain degree the pain is there... What is it ? Is it muscle injury ? How long does it tale to heal?
Tithe muscular component of chest injury takes about 6 weeks to go.  Your CT is normal means no injury to ribs I feel the major problem is flu and sneezing. Control of flu is must help heal the injured muscle.