Is it normal to have an early light period lasting only 2 days after starting all veg and fruit diet And having unprotected sex the week previous?

It's possible to experience light and shorter menstrual periods after making significant changes to your diet, like adopting an all-veg and fruit diet. Sudden dietary changes can affect hormone levels and, in turn, menstruation. Additionally, unprotected sex during the fertile window can increase the chances of pregnancy. If you are concerned about your menstrual cycle or think you might be pregnant, it's best to take a pregnancy test and consult a healthcare professional to rule out any underlying conditions.