Car accident 1.5 weeks ago, told ribs contusions. pain started to improve but suddenly much worse past few days. could it be cracked or broken now?

Possible, but ...: Possible, but still worthwhile to give time and patience for the body to process its self-healing and remolding over the next 2-4 weeks as long as being okay in breathing, because further evaluation would not alter the direction and content of conservative care at this time. Of course, if unbearable, chest brace + pain medication under close watch may be needed.