Foot injury---please help! (it is possible people who do ballet might now)?

I have hurt the ball of my foot very badly to the point where it is excruciating to walk on it. I have recently began a harder ballet cl where everyone in my cl is on pointe except me, so i have to go on the ball of my foot a lot! I went to the doctor and got an x-ray yesterday, and they said it wasn't broken but i had done something to the ligaments in it. It looks like: ball point of my foot totally swollen, and some points black and blue hurts to the touch, also side of big toe red, (possibly blisters), pinky toe swollen hurts to push lightly on the side. Is this normal for dancing for something like this to happen. I have been wearing spacers lately to prevent bunions. what have i done to the ball of my foot? what should i do now?