Safe Sex/Sex Education/Menstruation

Hello great minds. Based on a series of posts from this community and social media, Permit me draw to your attention the following, that are often misunderstood. I look forward to your positive response, i just need to get a clear picture from these questions.

Ex: (Case Study) Menstrual cycle 7th jan to 2feb (27days cycle). 5days period

1) When Does Ovulation occur

2)When is the unsafe period(fertile window)

3) Is there a safe period? +(when is the least chance of pregnancy during the menstrual cycle)

***Can Postinor2 be taken after an unprotected sex during safe period or after condom burst

4) What are the chances of getting pregnant a week before next period.

5) When will sex be less painful after loosing virginity, does it hurt the second time? When does the pain stop permanently

MISCONCEPTIONS from research

**Ovulation occurs (two weeks before the next cycle, 1 week after your period ends, two weeks after the period.

**Safe period( 3 days after the period ends, 5days before the next period).