Okay so I put my ring in on the 29th of October. And I'm supposed to take it out on the 19th of November. I'm going on a trip the week after that. Can I keep the ring in until the 25th and take it out on the 25th? That would be 28 days exactly I believe. If so, when I take it out do I get the free week and let my period come or do I put one in immediately after I take it out???