Absolutely.
In addition, I find a higher BG always magnifies any niggles, pain, illness.
So, if I have a runny nose, my BG rises and, as my BG rises, my nose runs even more.
As a consequence, it becomes more important to try to bring my BG down with corrective bolus and, maybe increased basal.
This takes a bit of trial and error and more testing than usual.
I hope you feel better soon - rest, drink plenty and look after yourself.