Is it true the menstraul cycle can range from 21-35 days? i am 5 days late, its been 30 days no sign of period should i wait 5 more days?

Period late: Since stress and emotional turmoil from any cause can delay ovulation, and the "period" always comes almost exactly 14 days after ovulation, the menses can be from 21 to 35 days depending on when ovulatin occurs. Most women do not vary more than a day or two, so if your period does not come in the next five days, obtain a serum pregnancy test, and if negative see your health provider.