Glad you dropped by the chronic pain forum Miser. My thoughts are on the same lines as Screaming Eagle. Fibromyalgia popped into my head first but possibly lupus or lyme disease too. With the pain being on both sides of your body and being on the upper & lower quadrants of your extremities and with the feverish feeling fibro is my first choice. Fibro can also cause bowel issues.
Maybe you could talk to your doctor about
running some bloodwork to check for any auto-immune diseases, sorry to say there is no distinct test for fibro other than ruling out other causes and then going by your symptoms.
Good Luck and keep us posted if you find out anything.
DDD, osteoarthritis, facet syndrome, fusion surgeries C-5/7 & L-4/5 both in 2006, torn meniscus surgeries left knee 2000 & 2002, buldging disc L-2/3