Could you be pregnant if had an irregular period last week and it was really heavy the first day then only lasted for a half spotting not even enough to wear pad?

It is possible to be pregnant even if you had an irregular period last week. Pregnancy is determined by whether a fertilized egg implants in the wall of the uterus, and this can occur even if your period is irregular. Some early signs of pregnancy include:

- Missed period: If you are pregnant, you will likely miss your next period. However, some women do experience spotting or light bleeding during early pregnancy, which can be mistaken for a period.

- Breast tenderness: Your breasts may become tender, swollen, or tingly in early pregnancy.

- Nausea and vomiting: Also known as morning sickness, this is a common sign of early pregnancy. It can occur at any time of day, not just in the morning.

- Fatigue: Feeling tired or exhausted is a common symptom of early pregnancy.

- Frequent urination: You may need to urinate more often than usual in early pregnancy.

If you are experiencing any of these symptoms, it is important to take a pregnancy test to confirm whether you are pregnant. Pregnancy tests are available at most drugstores and can be taken at home. If the pregnancy test is positive, you should make an appointment with your doctor to confirm the pregnancy and begin prenatal care.