What Causes Low Grade Fever Along With Red And Hot Leg?

I think I have a blood clot in my right leg. It s red and hot to the touch, and I m running a low grade fever. I ve had the flu and been sick since Tuesday. When the rash first appeared, I thought it was a reaction to something . Now I m worried its a blood clot. YYYY@YYYY I will go to my doctor in the morning.