Need advice!

I’m 32 weeks pregnant with my first baby and have tried to quit smoking a couple times without success. I can’t eat or sleep so I smoke. I’m wondering what to expect when giving birth if they’ll drug test? how do I prevent THC showing up in the baby’s system? I can smoke a couple times a week and be okay but I know I’ll test positive. I live in Wisconsin too. My first prenatal panel blood test they did a toxicology screening. So I tested positive once so far, but my doctor never mentioned it. I just saw the results online in my email. Any advice is welcome!