My sons have both been unwell but the youngest on who is 14 is now in week 4 of it. Started feeling lethargic, high temp then started coughing and has had diarrhoea. He’s also been sick quite a few times but this seems to be mostly with coughing. Took him to GP last week and he decided to give him antibiotics for a possible chest infection. He’s finished these now but still coughing, had diarrhoea again and now has a sore ear. I’ve done a couple of covid tests that have been negative but guess I could have missed it. Is there anything going round causing these type of symptoms? Thanks