What is my ovaluation calculation?

Hi,
Welcome to ehealthforum,
It is difficult to predict your ovulation time without further details. If you are having regular menstrual cycles, you should monitor your cervical mucus changes and the BBT (basal body temperature) charting to predict your ovulation and time your intercourse for having fruitful results. Have intercourse in positions that allow for deeper penetration for high deposit of semen.
If you have been trying for pregnancy and have not been successful, you should consider getting a complete infertility work-up done for you and your partner to see if there are any underlying causes for the infertility/inability to conceive. Treatment as needed (based on examination and investigations results) would be started to help you get pregnant. Consider visiting your gynecologist/obstetrician for further evaluation and assistance and be in regular follow-up and monitoring.
Take care.

my menstural period is jan 2 and ends on jan 5 and also i had regular periods on every month. i have intercourse on jan 9,10,11,12,14,15,17,18,20. so any chance of getting pregnant and when should i confirm my pregnancy