Hi, I've been reading everybody's posts, but I haven't seen any...

Hi, I've been reading everybody's posts, but I haven't seen anyone complaining about my problem, which is completely erratic periods. I've always been very regular, but since I've been on the ring I've been completely unpredictable which I thought was the exact opposite of what was supposed to happen! For example, I put in a new ring last Monday after having it out for a week, as prescribed. I got my period during the "out" week, which is what is supposed to happen. But now, 10 days after inserting the new ring, I'm having my period again. Is this something to worry about?