I just had my last smoke

I just had what I hope is my last smoke.  I'm looking for some words of encouragement to help me through this.  This is my third pregnancy, I didn't quit with my first two (both very healthy kids) but I'm a few year older now and want to do what's best.  I've been a smoker for a long time and if I wasn't pregnant (10w2d) I probably wouldn't be quitting, I still enjoy it so it's going to be hard to quit.  Please no negativity, it's not something I need to see at the moment.  Thanks for reading!