Well, you are clearly cherry-picking verses that make your case stronger. Interesting you don't mention any of the other things in Deuteronomy that kept a person from the assembly, like having a grandparent who was foreign, or for some people/groups ten generations. What about some of the other laws in Deuteronomy 22-23? Should we follow this one?

28If a man happens to meet a virgin who is not pledged to be married and rapes her and they are discovered, 29he shall pay her father fifty shekels c of silver. He must marry the young woman, for he has violated her. He can never divorce her as long as he lives.

It's really important to consider the whole picture of scripture, and I think you are flat out misunderstanding what is going on in Deuteronomy. It's not about fertility, it's about completeness. It's about life over death. Further, you seem to miss that the Ethiopian Eunuch in the New Testament is a literary reversal of that injunction in Deuteronomy. Under the New Covenant, God accepts all who come.

It's great that you feel called to have babies, but you shouldn't take command given to Adam (mankind) and later Noah, the new Adam, as personal instructions for every man and woman on Earth. If you do that, getting married and having babies are required for salvation, or at least to please God. What about people who can't find a mate? Are we disobeying God? Should we get a mate the way they did in Deuteronomy 22?

What about circumcision? Is that genital mutilation? You say that God will provide for the children, and I'm glad it's working out for you, but where I'm from (not that far from you) lots of kids aren't provided for. Lots of kids are brought up in terrible conditions. Poverty is not solved by faith, no matter how much you want it to be. Sometimes it is better to stop having kids when you stop being able to provide for the ones you have.

Or, if you think God will provide always, I can get you a list of kids that could use a little of that provision. Got a few million bucks lying around? No? Oh well, I guess the government will take care of it...