Distal Fibula fracture. I walk with it?

On 5th November I had twisted my ankle and I fell down. The following day I visited the doctor and after an x-ray, the doctor told me I had distal Fibula fracture. I was on plaster for 5 weeks 3 days. After cutting the plaster another x-ray was done and the doctor said a small part of the crack is yet to be healed. He asked me to try walking but I still had pain. So he has now asked me to try walking for  3-4 days and also putting my leg in warm water with salt in it and try rotating my leg. If after 3-4 days if I still have pain in my leg I again have to plaster my leg. I really don't know what to do. With the plater on, I won't be able to walk for a couple of days again and it's hampering my office work. It's already been 40 days. How can I relieve my pain? Or atleast how can I still manage to walk a little atleast with this pain and if I need to put plaster again.how do I walk with it? My last plaster was too thick to walk