Had the start of a cough on the 6th had a test on the 7th came back negative. Cough is now really constant but I have no other symptoms. Should I go for another test? I’m worried that I went to quickly the first time. Or would you just assume it’s just a normal cough and the test results were accurate. For reference I’m a key worker so don’t want to self isolate if I don’t need to and kids are still in nursery.