You are a married young woman who can have as many children as you want to in THIS country, and you don't owe anybody any explanation, or so much as a RESPONSE if they interject their opinion as to what age is ok to become pregnant.
But it takes MATURITY to raise healthy kids, and anybody who refuses to obtain medical treatment because of fears they'll receive a lecture is not exhibiting the greatest level of maturity, much less problem-solving power!
If you're serious about what you want, then stop all the runaround and go AFTER it! The only thing between you and a family right now is YOU.