I took a test 6 or 7 days before my period, it was negative. my period is now 4days late. my lmp was 11days late before coming on. is this normal?

Some thoughts...: In a woman with regular periods, some causes of a late period include: excessive weight loss or weight gain, increased exercising, emotional stress, having an illness, traveling, certain medicines, hormonal imbalances, etc… Seeing a doctor is a good idea if symptoms are persistent, recurring, or worrisome. A home pregnancy test is very accurate at 3 weeks after sex or 1 week after missing period.