Nevermind, I'm dense. This was a false alarm because I didn't do the test properly.
So, I know there's some potential evidence that doing a throat + cheek swab in addition to the nasal swab can help to detect COVID earlier and more accurately than just doing only a nasal swab (like, I've seen a lot of COVID-conscious people do this). I know most of these rapid tests explicitly give instructions on ONLY nasal swabs. Having said that, I've been doing the throat + cheek swab with the nasal swab for years on rapid tests and I've never had a problem with it. I was only doing it because these tests are often shitty on picking up on COVID on the first go-round, especially with newer variants. This method may have saved me when my household had COVID a couple of years ago--the test immediately picked up COVID on the first day my spouse and kiddo showed symptoms, and I managed to dodge it somehow.
However, I tried the throat + cheek and nasal swab on an IntelliSwab and it was a positive result.
The next day (Tuesday), I tried only a nasal swab on an IntelliSwab. It was negative.
On Wednesday, I tried a mouth and nasal swab again on an IntelliSwab. Positive. Then I tried a mouth and nasal swab on a different brand of rapid test. Negative.
On Thursday, I did another mouth and nasal swab on IntelliSwab. Positive. Then I did a PlusLife test (much more accurate, closer to PCR in terms of accuracy) on the same day and it was negative.
Yesterday, I did another PlusLife test, again negative. Then I also tried a FlowFlex combination test for COVID, Flu A, Flu B, and RSV and again (as I wanted to make sure I wasn't sick with anything to give to my family before coming out of isolation), all negative.
I had all my symptoms subside within 24 hours. That doesn't necessarily mean I wasn't sick with something, but I also feel like my symptoms (headache and chills) potentially could have been due to stress, lack of sleep, and spending too much time in the cold in not enough layers.
I asked around in my COVID-conscious groups and pretty much everyone agreed that it was a false positive/invalid result, and a LOT of people had the same exact thing happen to them when they tried a mouth AND nasal swab on an IntelliSwab test. Apparently this is such a common thing to happen that my local Mask Bloc had previously made a social media post about not doing a mouth and nasal swab on IntelliSwab tests.
So I guess this whole thread is a cautionary tale that if you're doing a mouth and nasal swab on a rapid test that gives explicit instructions for only nasal swabs, there is always a risk of an invalid result.
But whatever you do, DO NOT DO A MOUTH AND NASAL SWAB ON AN INTELLISWAB TEST.
Don't be like me.


