If your period is significantly delayed and you have received a negative pregnancy test result, it is possible that you could still be pregnant. While home pregnancy tests are generally accurate, they can sometimes produce false negatives, especially if taken too early in the pregnancy. It's recommended to wait a few more days and retest using a different brand of pregnancy test or visit your healthcare provider for a blood test, which can detect lower levels of hCG hormone. Additionally, there are other factors besides pregnancy that can cause missed periods such as hormonal imbalances, stress, changes in weight or exercise routine, certain medications, and medical conditions like polycystic ovary syndrome (PCOS). If you continue to experience irregular periods or have concerns about your fertility, it's best to consult with a healthcare professional who can provide further guidance and perform any necessary tests to determine the cause of your missed period.