Hi Dr. I am 23 years old. I am generally having a regular cycle of 30 31 days. In Feb 2023 my periods were 13 days late and in sonography it found a simple cyst but I haven't taken any medicine for the cyst and for periods at that time but from March onwards my periods were regular on time. So, From last month I am taking
vitamin D supplement once a week and alternate day
vitamin B12. So this month My periods are delayed by 3 days. What could be the reason ?