hello, welcome to HCM
as per the details u have submitted,
direct hiiting of ur chest to hard surface leads to mild contusion
and soreness.. but becoz its a rib cage
, due to the movements of the lungs inside the rib cage you will experience pain ..so advise you take rest and avoiding physical activities that icreases your respiration and lifting weights.
And u use pain killers like zerodol-sp once daily ...nothing to worry much about it...
if u have any further pain ..date a digital X-ray of chest
hope this will help u