Is this normal on pointe?

So I got on Pointe in June and have been taking a pointe cl once a week and a partnering cl on pointe. My Achilles starts hurting after a while on pointe. I've had a little bit of trouble with my achilles when I used to play soccer, but I dont know if thats related to this. I dont know if maybe Im doing something wrong or if its just how everyone is when they start pointe. thanks :)