I have been married for 3 years and cant get pregnant now....we really need to have kids.
Have you used birth control? If so, what was the name and when did you stop? Some, like Depo, can last a very long time.
If it's been more than a year of "trying" then you BOTH need to see a fertility specialist. It may not be you - it can be the male.
You can expect a complete physical and internal exam, including a blood panel (to check hormones levels). Your husband can expect to have a semen analysis.