I just wanted to say from an older persons point of view - there is nothing wrong with being young and having a baby! Provided you are prepared emotionally to look after that little person, what is the big deal?
There are so many people who have done it, and gone on to do wonderful things with their lives, so please dont stress. Travelling, careers etc all come to people who want and deserve them, and a baby isn't going to hold you back if its what you want.
I guess why people "judge" younger couples is because in this world there is so much pressure to be financially secure and own a home! And it is tougher to do that on one income - but certainly not impossible. And parents always think they know best. Hell - I'm nearly 29 and my Mum is still worried about me being a mum! In a parents eyes - are we ever ready?

If you have thought these things through, adn you know you have the love and support within and around you to be a great parent, there is nothing holding you back. Best wishes to you TTC!!

Fi