Can cramps and lower back aches be a sign of pregnancy even before missed period neg test?

Cramps and lower back aches can be early signs of pregnancy, but they can also be caused by a variety of other factors, such as menstruation, ovulation, or even stress. A negative pregnancy test does not necessarily rule out pregnancy, as it may be too early to detect the presence of the pregnancy hormone, human chorionic gonadotropin (hCG). If you are concerned that you may be pregnant, it is important to consult with your doctor for further evaluation.