Hi
@Awiiiiin and I'm so sorry you're not feeling well.
If I remember correctly you're on insulin?
Some syrups will have sugar in them (there may be sugar free ones?) but unless you're on a zero carb diet I would have thought that you could include them in your carb allowances???
To be honest most diabetics expect a blood sugar rise when they are ill so I personally wouldn't stress too much if your levels go up slightly. Have your diabetic team given you sick day rules on how to modify your insulin when ill?
Not a diabetic issue but a general health one: I hope you are being careful not to overdose on the paracetamol? (Check whether any additional meds you take contain paracetamol).
If in doubt, talk to a health care professional, particularly if your blood sugars go high and you can't get them down. But non diabetics need doctors too so don't be afraid to seek help just for the high temperature. Are you living with others so that you have someone to help you?
I hope you feel better soon.