I Am Cold And Even Shiver And Have Stinging Pain

I am cold and even shiver and have stinging pain around and in my hips. When I lie down it is painful to get up or turn over. I have to find a way to push myself up with my arms to avoid shots of acute pain. When I sit the lower back aches and stings.This has happened for 2 days. I have just flown from California to Melbourne. I am usually very active. I dance. I never get sick. I've been thinking it might be the flu which I have not had for many years but could have caught on the plane.