If you are on the pill and have spotting then your next period is only 3 days rather than normal 5 or 6 late again lasts could be pregnant?

It is unlikely that you are pregnant if you are on the pill and have experienced spotting, even if your next period is shorter than usual and arrives late. Spotting, which is light bleeding or spotting that occurs outside of your regular menstrual period, is a common side effect of birth control pills, especially during the first few months of use. It is usually nothing to be concerned about and does not necessarily indicate pregnancy. However, if you are concerned or have any other symptoms of pregnancy, such as nausea, breast tenderness, or fatigue, it is always a good idea to take a pregnancy test to confirm.

It is important to remember that birth control pills do not always offer 100% protection against pregnancy, so if you are concerned about the possibility of being pregnant, it is best to get tested.