Having your period means you did not conceive!
first of all you cannot conceive one week before your period.you can conceive only during the ovulation period which is 14 th day of your cycle if you have a 28 day cycle.
Yes you may have a period or a lighter than normal period.
Yes this is usually called implantation,after you conceive if not get it checked out
Women are most likely to conceive at the time of ovulation. Ovulation can happen a week after your period until your next period.
It is possible that your period can be late if you miss a week of the pill. It is also possible that you are pregnant.
If you got your period it is extremely unlikely you are pregnant. And if you are trying to conceive you usually need to have sex 2 weeks before your period is due.
Generally you can't get pregnant on your period, however, if you have a very short cycle or if you ovulate within a week of stopping your period then there is a chance that you may conceive. Sperm can live for around a week once inside the woman, so it is possible that some women may become pregnant if they have sex while on their period.
It is possible to get pregnant while on NuvaRing, but not very likely.