I had protected sex on May 11, the week of my ovulation cycle. My period was supposed to come May 26 and it’s still not here, today is May 31. Please?

Can do preg. test. 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 a doctor is a good idea if symptoms are persistent, recurring, or worrisome. Pregnancy is the common cause of a missed period, if sexually active.