Hello, I just experienced a sudden sharp almost debillitating back pain; middle left side that seemed to penetrate to the front. I tried to lie down but could not get comfortable. Accompanied with light nausea and fever; thermometer reading was normal, however. Symptoms passed after 20 mins. or so after taking two aspirin. Now the pain is light and not severe. I experienced this once or twice before in the past month or so, but to a lesser degree. I am a cauc. male, 57, 5 -8 , 190lb. I run 1 to 2 miles daily and have a good, mostly veg. diet.