Need help on quitting smoking!!!

Shay
I found out I'm pregnant on Monday and I can't seem to get it through my head that I'm pregnant. I smoke and know I have to quit NOW, but haven't. As soon as I found out I was having my first, I immediately threw out all my cigarettes and didn't smoke throughout my pregnancy. I can't seem to get it together for this pregnancy. I've taken four tests, all positive. Any advice?