"Long Waiting Time"

I have been referred for urgent MRI scan here due to muscle tear in my Knee by GP from King George sergery and i have been given 4 weeks of waiting time. if i have to wait for 4 weeks to get MRI done and after getting reports only i will be referred to orthopedic appointment .l am having severe pain in my knee and unable to walk and now i have to wait for 4 weeks for MRI to be done. How can i expect this to be treated so that i can recover and it doesn't leads to severe case.