Do you think bad habits come into your life for a reason?

I have a number of bad habits from my teenage days to now, fortunately I wasn’t a smoker when I was pregnant with my daughter Chiara, but until recently I was a smoker and I have my fears for my new pregnancy. I am now nine weeks pregnant and I have given up cigarettes, but what damage might I have done to my body that might impact on my pregnancy in some way?