My 18 year old dd started on Christmas Eve with a slight sore throat and blocked nose, she has also developed a cough since then. She is isolating in her room. She has had 6 negative lft’s over the last 4 days and I am trying to book a pcr for her. What is the likelihood of all these tests being false negative’s? Also my 14 year old ds has a slight sore throat today, he is unvaccinated and I am terrified that if it’s covid that he will become very ill. I have severe health anxiety and I am catastrophising. Any reassuring replies would be gratefully received.