How confident was it in that diagnosis? Did you trust its confidence if so? I asked this to my medico wife and apparently the other possibility is pericardial effusion from injury which can be life threatening.
After answering questions about symptoms, it gave me a few movements/actions to do and to rate the pain of each. Based on that it diagnosed me and gave me a timeline of what to expect and things to watch out for.
Really it was as helpful as a doctor could have been in that scenario, IMO.