I do adjust my insulin when my bs is high, regardless of the cause. When I had a cold with a fever I had to be very careful, though. When the fever went up, my bs went up as well, but when the fever went down due to taking paracetamol the bs went down too. I found it really funny with my feverish brain to control my blood sugar with paracetamol, but I had to take care not to correct too much with insulin. Get well soon!