5th metatarsal avulsion fracture

Hi there, just over 6 weeks ago I sprained my ankle quite badly (high heels, slippy floor) and also got a non displaced avulsion fracture in the tuberous part of my fifth metatarsal, a complete break. The doctor gave me a removable boot and said I could walk on my heel. I tried to do this but the ankle sprain made the boot very uncomfortable so a lot of the time I just hopped or used my heel, except when I left the house.

After 3.5 weeks there was no change on the x-ray, which I found really depressing, but the pain had gone down quite a lot and the doc said I could walk flat-footed. I just had the 6.5 week x-ray and it has started to fuse together from the inside and seems to have healed from a third to half way in - however there is still the same gap (quite large it seems to me) on the outside, where there is also a bony lump (still not displaced).

The doctor has said I can walk normally now but not step up on my toes, jump or run - I'm a bit worried this is taking a lot longer than it should, even though the pain has all but gone unless I press it hard, because that the gap is still pretty big. Is it normal to heal inside out in this way or do you think this gap is stubbornly going to stay - any advice that might set my mind at rest would be appreciated, would you say this is still within normal healing time or should I try something else? Thanks for your help.