Hmm, 48 hours since an external pip still sounds extremely long. Something is up. I would get a q-tip and some coconut oil and apply it to the exposed membrane, avoiding where her beak has penetrated because you don't want to suffocate her. Once you lightly put on the coconut oil it will make the membrane transparent and you should be able to see if she still has blood to absorb. A picture would be very helpful so we know what you're looking at though. I don't want to tell you to do the wrong thing...