Ive been sick for a week and i missed my period (9 days) my last period was nov 16th...i have sexually active with my boyfriend but weve been very careful, can i miss my period due to being sick ?

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, medicines (like birth control pills), hormonal imbalances, etc… Seeing her Ob-Gyn doctor is a good idea if symptoms are persistent, recurring, or worrisome. A home urine pregnancy test is accurate 3 weeks after sex.