Please help me my mother has cancer and is doing chemotherapy and i cant get her to eat...?

She has already lost 30lbs, is not acting like herself at all, has absolutely NO appetite and no matter what I give her she won't eat it, our family is beside ourselves we have tried everything I don't know what to do, she says everything tastes bad and she can't swallow chunks of anything and has bad indigestion, she has meds for diarrhea and nausea but she won't swallow them, can anyone give me some advice? Personal stories? Anything? I'm desperate for some outside help I don't know what to do, I am contacting cancer care tomorrow and her doctor.