why is this happening to us?

when my husband and i decided to start a family we got pregnant right away but it ended in a miscarriage at 6 weeks. we dusted ourselves off and tried again thinking it would happen the same but this one will stick. little did we know it was the longest journey of our lives. 2 1/2 years later we finally got our beautiful rainbow baby girl. we look at her and thank God everyday for trusting us with one of his little angels. she just turned two and we are approaching one year of ttc for #2. it's getting so discourage. i relax and its not happening and i track and its not happening. i dont want to wait another 2 1/2 years for our 2nd miracle. i'm also so sick of people asking "when are you going to give her a sibbling?" or "have all your kids close together so you can be done with diapers all at once". ugh...