Hi My LMP is 9 Feb but my GA (AUA)

Patient: Hi. My LMP is 9 Feb but my GA (AUA) is 5 days pior so is it possible to have intercose on 7 Feb,pregnant and then have abnormal period on 9 Feb? Normally my period come 3 days but my LMP came only 1 day by using 2 pad with bright red blood and not heavy as used to.

Doctor: