Hi Maybe Baby,
I hope you don't take offence at this but please bear with me!
When I first read your post about your age and situation I thought you were off your head wanting to have a child at your age and thought that there's no way you've made up your mind about wanting a baby-it's just a phase. HOWEVER, the more I thought about it I realised that what I was horrified about is that there was no way I would have been ready at that age and I definitely wouldn't have been able to make the decision back then and be set on it - it would have totally been a phase of wanting in my case. FFS, I'm barely able to make a firm decision now at the grand old age of 29!! You're obviously far more mature at 19 than I was.
Like others have said before me, when you're ready, you're ready and no-ones opinion counts except that of you and you partner. Good luck with everything and I hope you get a little bundle in your belly soon!!
B4M xx