Heavy smokers prior to pregnancy

I was a 2 pack a day person for more than 4 years. And when I found out I became pregnant, everyone's telling oh you have to quit now, but those were non smokers. And I've had mommas with 3-4 kids say how they cut back and that if I do quit cold turkey, my body will go into stress and actually cause more harm and their pregnancies went while they smoked, and looking at their kids, they are so healthy and energetic, I've cut back a lot, and I mean a lot, on good days I'll smoke 3 cigarettes max, but bad days it'll be 5-6. I'm at my 2nd trimester now, and so far I haven't been wanting that extreme crave to smoke and I'm doing good at bringing my numbers down, I was wondering if there are other ladies who smoked during their pregnancy and how they are doing.