irregular periods, What should i do to conceive?

Hi,
Welcome to ehealthforum,
Irregular periods could be suggestive of anovulatory cycles and involvement of hormonal issues. The successful pregnancy depends on many factors (ovarian, uterine, hormonal, stress etc). 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.
Timing of intercourse during your fertile days is also important for success. For a regular menstrual cycle of 28 days, fertile days would lie between day 8-16 of the cycle taking day 1 as first day of bleeding. Combine checking cervical mucus changes and the BBT (basal body temperature) charting to predict your ovulation days and time your intercourse for having fruitful results.
Hormonal issues, problems involving ovaries and ovulation, uterine problems, cervical or vaginal infections should be ruled out for you. For your partner, semen analysis should be done to rule out infections and to confirm the quality and quantity of sperms produced. 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. Be in regular follow-up with your treating doctor/gynecologist. Maintain healthy diet rich in foods containing zinc for better maturation of egg and sperms. Drink plenty of water. All the best.
Take care.