WishingGirl's Trying To Conceive Wish

I have been trying to conceive for about 6 months on and off. Both my husband and I are in our late 20's and I have never been on the birth control pill (for health reasons) and I have never been on any type of drugs that would case a problem in conveiving. I have been married for a little over 4 years and we really want to have a baby. I wish so badly to have a baby. I feel we are really at a point in our life where we are ready for children and would be great parents. Any advise?