My period has been like clockwork, starting on the 14th every month. Lately it’s been starting later and later. <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> said I would start on the 18th. Which was weird but I didn’t think anything about it. It’s the 20th and I haven’t gotten any cramps or anything. I have been under extreme stress, and I have stomach issues. My boyfriend has been telling me I’m fine. But I am really worried I can’t be pregnant I am 16 years old. I need someone’s opinion/advice