Can a girl get pregnant 2days before her period?

Answer 1

No, by the time a woman is two days off menstruation the egg is long dead - ovulation typically occurs two weeks before menstruation, and at most there is only a viable egg present for 48 hours. Typically a woman will not have fertile quality cervical mucus present at this point either.

However unless a woman uses fertility awareness methods she cannot know exactly when she is fertile or when she is not, also often women can mistake vaginal bleeding for other reasons (such as ovulation bleeding) for menstruation so assume they are not pregnant when actually they may be at risk of pregnancy or already be pregnant.

Long answer short is that it is not possible, however if a woman wants to avoid unwanted pregnancy she should always use birth control.