Bad habits

Please dont judge me. I beat myself up for it already. I'm almost 15weeks and I just cant bring myself to quit smoking cigarettes. I know it's bad. I know its hurting my baby. I have slowed down alot. Before I got pregnant I was smoking over a pack a day. Now I'm at 3-5 a day. My goal was to quit on July 1st but I'm extremely stressed with work and our closing date coming up on our house and trying to pack with 2 kids already. How can I curve the habit? How can I make the cravings go away? I want to quit. And literally every time I smoke I am telling myself this is bad. To stop. Sometimes I dont even finish one cause the guilt. But I just can quit. I need help. 😣😭