Tested positive last night week on pcr after almost 8 days of negative lfts, day after I test positive a nasal only lft shows a very faint positive, throat and nose was negative, tested again today with nose and throat one and again the line is barely there, just for pure curiosity though I did a nasal only one at exactly the same time and that's showing a very strong positive still - now run out of nasal only so will have to rely on the throat and nose ones but why such a difference? Does it mean I am doing the throat and nose ones wrong? Can I just swab my nose with the throat and nose ones (as they advise with kids)?