Shortly after she was born, I got pregnant again, then miscarried. It was at this time that my Protestant mother-in-law pleaded with me to use birth control because it would be unhealthy to get pregnant again so soon after a miscarriage. I told her we wouldn't do that, but were considering NFP. Her response? "Oh! So you have Catholic birth control? Great!"
This statement bothered me a lot and started my journey. I read every Church statement from the past that I could get my hands on regarding fertility and marriage and children. I read about prudence and God's Providence. I read all the NFP books that I had. I watched an episode of EWTN's "NFP: Embracing the Marital Gift."
My conclusion was that I could never, in good conscience, use NFP. I know the Church has approved it and encourages it- but it's not doctrine and those teachings can change. I am free to disagree... and I do. I refer to NFP as a current trend in the Church.