BPS can go a lot longer than a month and half without not eating and suffer no ill effects. Make sure your husbandry is up to par, and if it is, don't worry so much. Keep an eye on her weight and give it time(even another month or two). If you notice her weight dropping or strange behaviour, get her to a vet, that is your best course of action. Other than that, she'll eat when she wants to.This is a basic fact of Ball Python husbandry. They go on hunger strikes sometimes. This is espcially common in BP which are going through breeding cycles, sheds and stress, so, again, keep an eye, but don't freak out and switch on over to live yet.