You most likely have muscle injury
. Pain on particular movements is highly suggestive.
Improvement with time is a good sign. If you have skin discoloration, swelling or worsening of pain, you have to seek help.
It is not possible however to rule out bone - like a small hairline crack. But the chances are less > ultimately the muscle in that place will cause the same
In general, all will be well in fortnight. Even a muscle tear - like one in skin - will heal completely in six weeks.