metartasal fractures (and perhaps fractures of the bones of the foot in general) can take ages to heal. Primary reason recurrent loading delaying fracture healing...

you need to have a gait assessment done as already advised, you need to rest that foot and consider perhaps some form of PWB to avoid excessive loading, so a walking aid for a few weeks is needed. Cryotherapy is advisable (if RSD is not a feature), get the advise of a physio on how to use safely.

perhaps a review by an orthopeadic surgeon is needed to advise on an ortho boot if necessary so you can be functional in ur mobility without causing additional damage.

Do not expect to start dancing soon, if you have had a stress fracture (and I presume its a secondary effect of your dance maneovres), its likely gonna get worse with dancing and other bones in your feet might be predisposed as well. Dont make things worse

Also speak to ur GP, to have your blood work done to see if you have the adequate calcium levels. You might need ca supplements to help keep ur bones and aid fracture healing.

One complication to watch out for is RSD, reflex sympathetic dystrophy, a feeling of longer lasting pain than usual due to autonomic changes after trauma. This can occur even when there are no significant injuries to explain the pain.

My advise is be patient, speak to the right professionals and work with your physio as the fracture heals to optimise the possibility of you returning to dancing.