Welcome to Healthcare Magic Do you have any constipation or abdominal pain. You could be having irregular period because of possible hormonal disturbance. You should get examined by Gynaecologist and hormones like thyroid, prolactin checked. Also ultrasound may be needed to look for ovarian cysts. Drink plenty of water. Do exercise everyday. Avoid fatty, junk food. Eat plenty of fresh fruits and green leafy vegetables as overweight can be associated with certain types of hormone disturbance. Once the cause is treated and your periods become regular you may have better chance to conceive. Ovulation occurs on 14th day prior to next cycle. This is best time to have sex to become pregnant.