It seems to be in okay. I've been sitting here playing videogames, which for me means crossed-legs and shuffling around a lot, and no leaks. When I bear down, I can feel the rim, so I'm not sure if it's in enough. I'm a bit nervous because I'm going to work later. Luckily, I'm the one who cleans the toilets, so no one's going to mind if I lock myself in the disabled toilets with cleaning materials for half an hour, but still.:(
I don't need to leave till 2pm (it's twenty past ten now). so I'll empty it before I go, and take spare underwear and tampons just in case.
I'm also planning to do ten minutes of yoga, so we'll see how that goes.