instep/toe pain and cramping?

some history…i’m a toewalker (caused by a mild form of cerebral palsy) and have been all of my life. i’m 16. i’m also a dancer…i’ve had a history of some foot pain due to foot deformity because of the way that I walk. i’ve also gotten cramps before which I put off to dancing – for example, sometimes when I point my feet my instep will cramp. but it didn’t happen often, or it used to not, so I didn’t worry about it. also, whenever I was first starting pointe work, when I would go up on my shoes I would get like…a charley horse, in the arch of my foot.however…recently, as in, the past few weeks… I have experienced a lot of pain whenever I walk/point or flex my toes really hard. the pain is mostly in the last 3 or 4 toes…my instep has also been cramping up MUCH more often. I realize that as a dancer i’ll probably always have problems with my feet, but i’ve been dancing at the rate I am now for nearly two years and the cramping/pain has never been this bad. is this normal or should I be worried?