It takes the average, healthy couple 6 months to get pregnant, a year is considered totally normal if you are under 35. Most likely you are having sex at the wrong time in your cycle. From the time your period
stops you should have sex every other day to help catch that window for ovulation. If you start tracking your cycles (taking temperatures, marking your calendar, paying attention to cervical mucous texture, etc.) it will help pinpoint when you should be having sex.