Me and my husband trying to conceive a baby for 3 yrs time but we cannot conceive what we should do?

Time to consult: If you haven't already, it is time to consult with an ob/gyn about your reproductive health & begin the process of identifying any treatable issues. Both you & your husband may need to see a fertility clinic for additional testing. Good luck.

Seek REI care!: If it has been more than 12 months of regular (at least twice-thrice weekly) vaginal intercourse without contraception that has not resulted in any pregnancy seek care with a reputable reproductive endocrinology/infertility center asap to achieve your goals. Take Folic Acid 1-5 mg daily and good luck!

See a doctor soon: Normal couples conceive within 1 year - three years is way too long, especially for a 24 year old! see your OBG or a good primary doc to get started figuring out what's wrong and getting help. Good luck!