Can you tell me exactly when is it normal to start ovulating after period?

Depends..: The ovulation day depends on the length of your menstrual cycle:women that have a 28 days cycle usually ovulated on day 14-15, women that have a 25 days cycle will ovulate ~ day 11. If your cycles are regular you can subtracted 13-14 days from the total number of days of your menstrual cycle and this is how you know when you usually ovulate.