Hi! Before the period of my friend had a intercourse. Just for example 4 days before the period my friend she had an intercourse and after that she got her period on the month of feb 28 which the first day of her period lasted for 6 days.

And after her period she never had an intercourse with her bf. But this month now, she is delayed 6 days since 28 is supposed again her next period of this month. She took her pregnancy test but its negative. Is there any signs that she is pregnant coz she is very worried. Thanks for your response