What if you hold a regular interval and have sex a week after your length?
Answers: Well within reality we women own only a few days contained by the month when we can actually obtain pregnant.. and it's usually during the third week of our menstrual cycle. So I don't think you own to worry too much but if your spell does come late, it would be best to trial like a week after
Test AFTER you're due on. Otherwise it may own a false result. So if you're due on in three weeks, do it after that - preferably a few days cos it's possible that you may merely be a bit late for some motivation. It happens. And, unless you WANT to bring pregnant, use protection, all the time. That is right almost prime ovulation time for many women. I'd oral exam for pregnancy with one of the kit you can use before your missed time or see a doctor for a real interview.
Lay off the unprotected sex contained by the future unless you're trying to acquire pregnant.