hello, hope this message finds you in good mood.you are giving history of trauma to the chest and abdomen.you heard a crepitus sound may be suggestive of fracture
rib.you are also having pain while taking deep breaths suggestive of damage to pleura
and the lung.i advice you to meet your pulmonolgist and get chest x ray
and ct scan
if necessary to be done.meanwhile you can have some analgesics for pain relief.
hoping for your good health..