7 Weeks

So I just found out I'm pregnant about 2 weeks ago and I applied for insurance and I am waiting to hear back from them so I can make my first doctor's appointment! I'm not having very many "discomforts" other than some cramps every now and then and I cant get enough sleep! I am a very healthy person so I am certain that I will have a healthy pregnancy, but I have one concern...I smoke and I have greatly reduced how much I smoke since I found out. I used to smoke 7-8 cigarettes a day and I am down to 2 a day now. How do I quit? Is it horribly harming the baby's health that I smoke but very little amounts? I am so excited to go to the doctor!!! What a blessing in my life and it couldnt have happened at a more perfect time!!