Hi, thanks for writing to HCM.
From the description, I feel that you could have suffered a soft tissue
strain possibly a muscle catch.
The general management is as follows -
* avoid lying on the affected side
* Ice packing should be applied for about 20 minutes once in every 2 hours.
* Analgesic/ muscle relaxant
gel application over the affected area
* moist heat fomentation to relax the muscles
Hope this information is helpful .Good day