Hi,
It's always nice meeting new people on the site.
I sounds like you have really thought about this and done a lot of planning. I'm happy that your parents are supportive.
Have your parents encouraged you to get married? I can tell that you and your bf are really in love and it would seem that marriage would be the next logical step.
If it were me, I would not throw the cart before the horse, so to speak. You and your bf have a great relationship so why not get married and then have a child.
Getting married first would benefit all those involved. You and your boy can start to establish your life together and your home. Then when you bring a child in you are prepared. Not only that there is research that shows that children born into families where the mother and father are married are set up for success in their life.
Give the best to yourself, and your child. If your parents support you getting pregnant, it would seem that they would also support you getting married.