I've sort of done it both ways; aged 19, no boyfriend, no job initially (I managed to get a supermarket job at four months pregnant which gave me some money) and a ridiculous amount of debt and now (6 weeks pregnant) eight years later, aged 27, married, both earning 21k per year and with a small amount of debt from my husband's redundancy which was four months long at the end of last year and our wedding which we're paying off.
Small amount of debt - having a child is doable, but with two good full time incomes so that you keep up with your bills, repayments and essentials.
A large amount of debt, or one income - it's just not a good idea to add another life into the mix.
And if you end up relying on housing benefit or tax credits, you will get royally screwed in a vicious cycle. This happened to me with my first pregnancy and my benefits would be recalculated etc and suddenly I was in even more debt, but this time to local government.
I would think long and hard about this decision. Speaking from experience, you do not want the heartbreak of having to forgo gas and electric because you need to feed your baby.
Honestly, just get a job. We are crying out for hands over here in healthcare and the pay can be pretty good.