Smoking and pregnant!

Lori • 9 weeks pregnant , boyfriend left me going through a rough time :(
I'm 4w 6d and trying to quit! I keep telling myself that if I don't stop I'm going to lose another baby! I'm so scared when I go for my first scan I won't see the heart beat! I'm so stressed out I am trying my hardest to quit but so hard when I'm so stressed about the baby, and doesn't make things better that my partner doesn't want to have the baby! Is there anyone else Herr that smoking and pregnant?