Hi @miles that is absolutely right, you may have a fracture and your condition requires a physical examination with a doctor for them to make that determination and create a management plan tailored to your needs accordingly.
Given the pain is very severe every time you rest your weight per what you describe, depending on the doctor’s findings on examination he may need to arrange an XRay for you to check if there is a fracture. If there are no open wounds and other major injuries you can consider going to most A&E departments although the waiting time may be considerable.
There are however a few GP clinics that have XRay capabilities which you can consider as well, including where I work in RMH. Hope this helps!