Morning.
I do understand how you feel, but, the three top symptoms in the U.K. we're chosen as markets a long time ago (cough & temp initially and taste/smell much later) because most people -when tested have one of them.
However, as time has gone on people are recognising common earlier symptoms with 1/3 other symptoms showing up a few days later.
Other countries have recognised this and have a longer list of symptoms to prompt a PCR test.
The problem is with coughs that people decide aren't 'continuous' & a runny nose is that lots of people with those test positive, IF tested, but if not tested assume it's a cold, but may have very very mild symptoms BUT still pass it on to others. & think 'see it was just a cold'.
It's a tricky one to navigate, but he really should get a PCR, the results are coming back very quickly now, he should have the results in under 12 hours.
I'm hoping that by winter there will be an even quicker test that has a better accuracy once symptomatic that you can do at home even if you still need a PCR if the other one is positive.
So yes, I can see why you were told you shouldn't be in the chemist.