How normal is this? One of my friends was on the patch for over 5 years, she just came off of it last month, and now her period is about a week late. She said she's been kinda feeling like she's gonna get it for the last week or so, but it hasn't actually come yet. I tried googling this and didn't really find anything. I know that introducing an artificial source of hormones into your body can shut down your natural production, so it's possible after 5 years of bc her body is now like "wtf" and is still normalizing itself, but I don't really know that much about birth control. Has this happened to anyone before?