On the basis the reply isn't late:

Your thread for advise has brought out the pro-life community versus the abortion community. Both have presented their stand and sound reasonings.
Those that put you on a guilt trip for not being careful can be ignored. Choices have been made, history cannot be re-written and now consequences have to be tackled.

I will not make the decision for you as your life is not mine to live. The only advice i can leave it that you gain second opinions from relevant parties whom are directly and indirectly affected. What do i mean

With things like:
Cost of living
Cost of raising child
Mother might have to resign
Maid (possible)

It is good to seek advice from both side of parents and maybe 1 or 2 really close friends.

Things to consider:
Yea it is not cheap to bring up a child. Sacrifices has to be made, loss of sleep, lifestyle adjustments - but maybe parents can chip in a bit to ease the burden
On the other hand, abortion removes the long term responsibility of raising a child BUT leaves behind untold amount of emotional baggage and guilt. Will you and her be able to carry on and perhaps carry this to your graves?

Think long and hard about it, don't make another rash decision for one was made already which lead to this.