Dp tested positive on 1st of January after mild cold symptoms. I developed a sore throat, muscle aches, chest pain, headache and upset stomach in the early hours of Sunday morning. I took a test yesterday evening and today received a negative result. I was very confused by this but as my throat is so very sore I looked in the mirror and I have white patches on my tonsils. This could be tonsillitis but it doesn't explain the upset stomach or chest pains. What's the likelihood my infected tonsils caused Covid-19 not to be detected on my swab test? Should I retest or am I ok to no longer self isolate once dp finishes his isolation period?