Please Help

If I ovulate, have normal regular cycles, have a healthy normal uterus, have healthy normal ovaries, open normal fallopian tube, I'm relatively young (29) and my husband is healthy, young (30) and has average sperm, what am I missing? Why in three years of trying have we not been able to get pregnant? We've tried everything, including not trying, never, not once have I been pregnant. I don't know what to do at this point... Do we spend the money to see a fertility specialist if everything is healthy? Is there something I haven't tested or thought about? We are good people who love kids. I've built my whole life around being a mother. I've worked in childcare my entire life. I wrote my senior paper on how I wanted to be a mom. My husband is an amazing partner and wonderful with kids, we have been together for nine years and are so in love and want to build our family. At this point I just don't understand. Any constructive advice/ input (besides it will happen when it happens and this is Gods plan) would be appreciated.