Help, I want a baby!

Ok so I have wanted to have a baby for so long that I can't remember not wanting one. My boyfriend and I have been together for a year and a half and would be so happy if I got pregnant so we don't use any kind of protection or try to prevent a pregnancy. Unfortunately this still has not happened. I have a very normal 28 day cycle and we have regular intercourse if not more than regular. Every month I hope and pray that I won't get my period and that finally I will be on my way to being a mommy. The only time I ever got pregnant was way back in 96 and that pregnancy didn't make it through the first trimester. It sucks because I feel like maybe it will never happen for me and I don't understand why I can't get pregnant if I am so regular. I have started doing google searches to find different information and help in conceiving where ever I can. I started taking prenatal pills in March and took them daily for 2 months with no results. I have since stopped taking them but am drinking more water, eating more fruits and vegetables and exercising more to try and improve my health, not that I am in bad shape but I could stand to lose a few pounds. I need help and don't know where to look for it.