Thatās your perogative, but I find it very sad that you would reject the knowledge God has given us about our fertility.
Oh, not rejecting. God gives us LOTS of knowledge. He gave us knowledge about a lot of bad things too. NFP isnāt bad, however, it isnāt for every couple. It is common knowledge, but, should not be common in practice.
The Church makes clear that this knowledge of fertility in NFP is to be used only in serious situations, with grave circumstances. For infertile, as for fertile couples, it should be used as a last resort, for serious reasons.
Maybe God does not want a couple to conceive on a given day, but permits them to. He permits fertile couples to use NFP whenvever THEY deem is a serious reason. So although in no way sinning, they could do more perfectly the will of God by having no knowledge of their fertitliy, and letting God give them the children HE wants to give, WHEN He wants to give them. It more perfectly fulfills Godās will to trust in Him alone and not NFP. NFP can still have a tinge of āI trust in You God, but only 90%,ā even though not a bad in and of itself.
NFP still has that word āplanningā in it. You have made a choice to use the awareness of a God given knowledge (here itās fertility,) and PLAN according to that knowledge you obtained (to use or refuse marital relations on fertile days.) There is always a difference between planning and trusting. Like any good parent, God desires full and complete trust. God has a permissive and an ordaining will. His ordaining will is what HE wants from all eternity to happen. It requires a submissive trust in and complete fidelity to His will to happen. God also has a permissive will, which respects our free will and allows us to make choices, both good and bad. If a child asks for some store bought cookies before dinner, saying pretty please, looking irresistable, and promising not to spoil their appetite, the parent might permit this (āthe permissive willā.) In actuality, however, the mother was going to (āthe ordaining willā) make an extra-special dessert that was the childās absolute favorite, though she decided against it, since the child already ate the store bought cookies beforehand.
We may desire children, or desire to space births through NFP. For those struggling with infertility, we say āpretty pleaseā to God. He permits us to conceive a child and that is truly a gift from God. (As the store bought cookies were still a treat provided by the mother.) However, had we trusted and waited more patiently to conceive on the date HE ordained us to conceive we may have been blessed with TRIPLETS, though we were settled for one. He could not now give the triplets, we are already pregnant. The child could not have the special dessert, he already ate the cookies. For fertile couples spacing births with NFP, they say āpretty pleaseā no more children now. God, in His mercy, permits this, but may have ordained they not use NFP in order to bless them with ten children. However, in their old age, the couple may suffer intense loneliness since they only had three with NFP.
God wants to give us the best, we settle for less. He permits the less, but longs to have us trust in Him completely. The child did not sin in eating the cookies before dinner, it was permitted by the mother, though the store bought cookies wouldnāt compare to momās homade double fudge brownie delights! We donāt sin in using NFP, it is permitted by God, but who knows how good the āhome madeā blessings of God would have been. All we need is complete and total surrender and trust. It is VERY hard for saints, and near impossible for the rest of us.

But, it IS possible, for with God all things are possible.
If NFP works for you, and, after much prayer, you feel its a serious enough reason, then God is happy and pleased with your efforts and you are doing His will. Regardless of whether it is his ordaining or permissive will. Not to worry
Not using NFP and trusting completely in Godās will for their fertility is something many couples still choose. Whether they end up with none or ten children as a result, is entirely dependent upon the will of our merciful Lord and Creator of all life within.
Hope this helps. āWhoever isnāt agaisnt us is for us!ā
