I'm 19 and ttc please don't judge

I am 19 my fiancé is 20 and we are ttc. I really need some positive vibes and support. I keep hearing how I am ruining my life and his. But the truth is he wants this just as much as I do.  During our senior year of highscool I had a miscarriage. It broke. It's of our hearts.  I have had medical problems that run in my family since 16 they are getting worse. So we talked about it and we want to have a baby. I am less than a year away from an associates degree in elementary education and he is a CNA going to school to be a nurse. We want a child and we don't mind putting our dreams on hold for a chance to have our rainbow baby. We both miss our son dearly and want to grow our family. I guess what I'm asking is do you think we are crazy for trying this young?