Chills, fatigue, irritability, low energy/motivation, lethargy, difficulty concentrating, stiffness/aches/sore muscles (particularly in the abdomen, shins/legs and lumbar) persistent for better part of one week to 10 days. I took my temperature yesterday and it measured 96F. Even under six duvets and wearing a sweatshirt, socks and sweat pants to bed, I felt cold. I am 43F with PAH (2007) but am otherwise in good general health. Last test for LH and FSH had normal results (not perimenopausal). Could this be seasonal flu or something else?