Your husband and you need to get evaluated.
Your husband would require tests like semen analysis
, urine routine, complete blood count
You will require a series of tests like Ultrasound
of the abdomen and follicular study
, Hormonal profile including LH, FSH and Thyroid hormones, complete blood count.
I appreciate that both of you are healthy, but there has to be a reason for not getting pregnant. You also have to have regular intercourse at a frequency of thrice per week.
Hope this helps.