At bedtime last night, I felt generally unwell. Back had been achy, but I d been working at computer for hours. Weirdest symptom was sudden severe body chills that I couldn t control and lasted at least half hour until I finally could sleep after taking pillow away. Fever now of 101.6 and very thirsty I ve had UTIs in past, but having none of those symptoms. Ache in back is higher up, on both sides. Feels muscular, I think?