Hi Vicky,
Sorry to hear about your injury, sounds painful.
Recovery is very variable with this injury and it depends on whether anything else was injured at the time. Have you had an X-ray or scan?
In my experience if it's a simple dislocation of an otherwise healthy knee people can return to running but it can take time. It'll probably be around 3 to 6 month I'm afraid. Your Physio should be able to give you more guidance of prognosis and what to do when you see them, for the mo I would just wait and see, best not to start exercises and things until you've been examined.
Good luck
Tom