Some of this certainly sounds like neuropathy - the wearing three pairs of thick socks feeling, and a lack of sensitivity to heat. But I never experienced the shivers or butterfly sensations. Neuropathy symptoms can last beyond chemo treatment. Often there is not a great deal one can do apart from exercising greater care to avoid falls. I don't quite understand why you can't discuss it further with your oncologist but if that is a problem, have you a breast care or an oncology nurse you can get some more advice from?