How To Detoxify The Body From Marijuana During Pregnancy?

I'm 34 weeks pregnant. I have smoked marijuana during the whole pregnancy. I've smoked for several years on a daily basis. I slowed down but i still smoke everyday. I want to stop today and detox my body from the thc so it wont be present at the time of delivery in my system or the baby's. Is it still possible? What do i need to do? Im worry about the legalities of the drug testing at the hospital rather than health issues because im vegetarian ive been trying to sta pretty health and my doctor says everythig looks fine.