After playing golf today I was sat in the car and felt a sudden sharp pain in my rib area when breathing in (have experienced this a few times before). I started to feel worried and panicky but kept it under control. The pain lasted for a good 10 mins or so until I decided to lean back and have a stretch then it faded away. Any ideas what it might've been? My dad said it was most likely stitch or a pulled muscle. Was a horrible feeling.