It would be recommended to have your site of injury examined, whether it be by an orthopedist, chiropractor, or other musculoskeletal professional. Since there was no trauma due to impact, it sounds like you could have a strain/sprain of some of the associated soft tissues. Most likely x-rays will be ordered to rule out any red flags, but if it is indeed a mild soft tissue injury, this can be treated quickly. The fact that this has happened before and is so easily exacerbated strongly suggests seeking medical attention to address the underlying issue. Best of luck!

Michael Buczynski