Smoking cigs need help stopping

Don’t judge. I’m having a hard time stopping smoking cigarettes. I’ve been smoking for 15 years. And I just don’t feel pregnant even though I am pregnant. I can’t get my head around it that I am. And I know I need to stop. I’m 12 weeks today. And my last pregnancy I had a early miscarriage. And I you would think having a miscarriage the first time I would stop. But nope. Any ideas or what I can do to stop. ???