I'd say that if you are worried about leaving bubs while you work already you are going to be 100 times worse when bubs has arrived. I wasn't too worried about putting my son in day care before he was born. He'll be going into full time day care at 8 months. Now that he's here I am absolutely dreading it and we are madly trying to work out a way for me to stay home but have not been able to do so yet.

If I were in your position I'd stick to the original plan. I soooooooooo wish I was in your position.