And I use it exactly how it was told to. I'm a very paranoid person but I want to check. I took out my ring on December 23 and 9:00, had my period then put a new one in on the 30th at the same time. The next day was New Years eve and I had unprotected sex with my boyfriend he pulled out but I still get worried. I've been feeling tired and have had heartburn, along with being somewhat moody lately so I just want to make sure there is a slim chance of me being pregnant. Thanks!