Hi, thanks for writing to HCM.
Based on your symptoms, you could have possibly suffered a rib fracture
of the intercostal muscles.
An xray is necessary to rule out a fracture. The general treatment guidelines are as follows -
* avoid lying on the affected side which produces pain
* Use ice packing on the injured area once in 2 hours
* Gentle massaging with a painkiller gel
* Moist heat fomentation to relax the tense soft tissues
* Use analgesic
antiinflammatory medicines like Advil
Your symptoms may take around 2 weeks to settle down.
If you are concerned, approach an orthopedic surgeon for further management.
Hope this information is helpful. Good day