No, false negatives: you're tested as negative but you, in fact, have the virus. This is common for rapid antigen tests, and especially so if self administered.

No, false negatives: you're tested as negative but you, in fact, have the virus. This is common for rapid antigen tests, and especially so if self administered. False positives are not tipically a problem for this kind of tests. It's like the pregnancy test: if you see the stripe, you're very, very likely pregnant. If you don't see it, you can't rule it out with the same certainty.