If you took it out on the 27th as instructed (3 weeks in, one out)you may still get your period. Just make sure to put another one in on the 3rd of June and your cycle should hopefully go back to normal soon. If you put it in on the 6th and it wasn't during the first 5 days of your period this may be why you haven't gotten it but as long as you didnt have unprotected sex during the first week of having put it in you should be okay. In the case that you haven't yet taken it out, do so right away and wait a full week before you put another one back in. Hope this helped! PS: if you're worried, do a home pregnancy test before putting the second one in.