Welcome to the <span style = 'background-color: #dae8f4'>pain</span>
Management Forum. I am sorry to hear about your pain
An x-ray generally sees bones and
alignments.... it's not a good diagnostic tool for soft tissue including muscles, ligaments or tendons. It's my guess that one of those were injured.
I encourage you to return to your PCP and
request additional testing. Good imagining may be required to determine the actual injury. Please let us know how you discover. I will look forward to your updates.