thanks for your query.
1. On the first day of your period, chances of a pregnancy
resulting are zero.
2. you should have a gynecological evaluation to know the cause of light menstrual bleeding. It could be due to anemia, thyroid hormone imbalance
, tubercular infection
of the uterus etc. Some women normally experience a lighter flow each month which is of no consequence.
3. You should not take i pill casually, it will interfere with your normal period.That said, I pill or unwanted 72 DOE NOt AFFECT FERTILITY
IT does not cause complications in conception.
so wish you all the best.