Intercourse during a menstrual period is very safe from the point of view of conception, but carries the risk of infection as the tissues are vulnerable at that time. So, you need not worry about conception at all. In a regular 28-30 day cycle, fertile days or the days when intercourse can cause conception include days 11-20 of the cycle and the rest are safe. I would suggest a regular form of contraception
that suits your requirements. This would give you complete protection and allay all your fears. Hope you find this information useful. Wish you good health.