If you're wondering if you should be worried that your period is 5 days late, the answer is maybe. It could be nothing to worry about, or it could be a sign of something more serious. If you're sexually active, pregnancy is always a possibility. However, there are other reasons why your period might be late, such as stress or changes in your diet or exercise habits. If this is the first time your period has been late, wait a few more days and see if it arrives. If it doesn't, contact your healthcare provider to discuss what could be causing the delay and whether or not you need to take a pregnancy test.