Hello doctor. I am very worried about delay in my periods. I have regular period cycle. Since last month there is a delay in my cycle. Last month delay was of 2 days this month my date was 23rd but till now I did not have periods. I am very stressed from last month due to my exams. But now I am worried about the delay. please suggest me what to do. I have a normal cycle of 28 to 30 days and normal flow.