Confused

My husband and I are trying to have a baby since last year. 1 year and 10 months na kaming kasal. Regularly 7 days ang menstruation ko. But this month, I only have 3 days menstruation. This is the first time I experience a 3-day menstruation. Mommies, pls advice me, if I still have a chance to conceive. Salamat po sa sasagot.