I took plan B 3 weeks ago then again 2 weeks ago, but I noticed?
It means you didn't bother reading directions. Plan B is taken as soon as possible after a possible exposure to conception. Best if taken within 72 hours after coitus. Why take it again a week later? It is meant to mess up your cycle to prevent pregnancy. Depending if you took the home test according to instructions it means you are not pregnant. But one has to wonder if instructions were followed. You may want to repeat test a week later.