How can any qualified doctor say it's constipation causing her fever when its infection that causes fever!
Lots of things cause a high temperature. My son had a form of constipation when he was small where he could go to the toilet but there was blockage “further up”. I could tell when he had it by his temperature.
headache and fever the main symptoms of corona virus.
Breathing difficulties, sore throat and cough are main symptoms. You say your daughter has a bunged up nose (not a symptom of CV) but you haven’t mentioned a cough as far as I have seen.
Has anyone's child ever had A fever for 5 days plus though?
Yes! Both of mine have and so have I. Not pleasant but not an A&E job.
It is good and healthy to be concerned for your child but don’t let your anxiety take over. Both my DCs have, at different times, had bad viruses that have REALLY knocked them out for a long time complete with fever etc. Just keep up fluids, simple foods if she will accept them and recommended dose of paracetamol and ibuprofen.
There is no way I would be taking anyone to any hospital at the moment unless I suspected a broken bone or life threatening illness to be honest.