By the look of your X-ray you've suffered an oblique fracture of the distal shaft of the 5th metatarsal. This is actually quite common in dancers.

How did you do it? Were you up on your toes are the time? You definitely cannot and should not exercise or put any load on the foot (such as cycling) for at least 4-6 weeks until a repeat x-ray shows boney union.

In general fractures at that distal end of the metatarsal head do heal better with non-surgical intervention that those closed to the ankle end of the bone. This is as the proximal sites have poorer blood supply and often end in delayed bone union.

The conservative management requires a good reduction and position of the fracture. Has it been reduced (put back in place as good as it can). It there a repeat x-ray to show that? If so can you post it.

If it were my foot and I played a lot of sport I would ensure a good alignment if a non-surgical approach is the choice. Without that, and without time for good heading you can end up with a malaligned bone that can become problematic later on. In the end the choice is yours but if you want a second opinion (or 3rd) see a specialist foot surgeon.