My daughter is 27 years of age and had a molar pregnancy which led to cancer. since January and for four months she received several different chemo's. she is now left with sever ankle pain that comes and goes and often starts at her knees (sharp shooting pain) and or in her ankles into the sides of her foot. she is in so much pain that i'm getting ready to take her to the hospital (even though we're out of town), right now. How long will this last for?