Could you be pregnant if your period was almost a week late and very light with brownish color lasting for more than 10 days blood test negative but still feel pregnancy symptoms?

Irregular menstruation: In some cases, a woman's menstrual cycle may be irregular, resulting in a late or light period.

Implantation bleeding: This occurs when the fertilized egg implants into the uterine wall. It's usually light, short, and happens around the time of a missed period.

Hormonal imbalances: Conditions such as Polycystic Ovary Syndrome (PCOS), thyroid issues, or an early pregnancy loss can disrupt hormone levels and lead to irregular periods.

Certain medications or treatments: Some medications, like birth control pills, contraceptives, or hormone therapy, can affect the regularity and nature of menstrual bleeding.

Stress or lifestyle changes: Factors such as stress, strenuous exercise, significant weight changes, or travel can temporarily disrupt menstrual patterns.

If you're concerned about your irregular periods, it's best to consult a gynecologist or healthcare professional. They can conduct tests, evaluate your overall health, and provide the necessary guidance and treatment.