Could you be pregnant if your period lasts 3 weeks?

No, if you have a period lasting 3 weeks it is unlikely to be pregnancy related. Typically, a period lasts between 2 and 7 days. A period that lasts for 3 weeks is considered to be abnormal and may be a sign of an underlying medical condition. Potential causes of a 3-week period could be hormonal imbalances, uterine fibroids, polyps, or an infection of the uterus. To determine the cause it's important to consult a healthcare provider. Pregnancy is not a likely explanation for a 3-week period.