Ds had covid from 9-19th sept. He was fairly floored and still a bit lethargic after school/ falling asleep 6 pm etc. We’ve just been away and we were out yesterday and he said he wasn’t feeling well again . Said he felt foggy and sore ears. Thought he was faking but he had a temperature again last night. Obviously less than 3 months since last PCR. Do you think this could be something else or Covid again?