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Most couples achieve pregnancy within the first six months of trying. Overall, after 12 months of unprotected intercourse, approximately 90 percent of couples will become pregnant.
Since it has been more than 1 year since you have been trying to conceive, it is important for you and your partner, to get evaluated, to rule out any causes that can be treated.
Conditions like low sperm count in the male partner, or irregular cycles and hormonal causes (PCOD), endometriosis or Pelvic inflammatory disease- in the female are the most common cause of infertility.
Consulting your doctor for proper advice and treatment will be best step forward.