My 57-year-old, post-menopausal mother awoke last night with severe chills and, in turn, developed shortness of breath. I wanted to take her to the ER, as these can be symptoms of a heart attack, but she refused. She slept a few hours, only to find the chills returning (occuring now). I read that this can be a menopause symptom. She also has had ongoing back pain. Any thoughts?