Missing a period, having a negative pregnancy test, and experiencing left side abdominal pain can be concerning. While it is possible that these symptoms are related to your history of fibroids or previous miscarriages, it is important to consult with your healthcare provider for an accurate diagnosis. There are several potential causes for these symptoms, including hormonal imbalances, ovarian cysts, endometriosis, pelvic inflammatory disease (PID), or even stress. Your healthcare provider will likely perform a thorough evaluation which may include further tests such as blood work, ultrasound imaging, or a pelvic exam to determine the underlying cause. It's essential to seek medical attention to ensure appropriate treatment and management of any potential health issues.