I know you mean well, and I admire you for your faith.
However, I would like to point out that this type of attitude may be counterproductive and even dangerous to some people. I have seen people lose their faith or become atheist when they expect God to always provide for them, and then something along the way goes wrong… making them feel God has “abandoned” them.
It is much wiser to acknowledge that God loves us but to also know that he trusts us to make responsible decisions (based on good sense, not just emotion) and to know that our actions have consequences.
This has nothing to do with contraception, just my 2 cents on the general mentality of “God will provide.”