I Am 34 Weeks Pregnant I've Been Smoking Weed Threw

I am 34 weeks pregnant I've been smoking weed threw all my pregnancy it helped me a lot with several symptoms that were caused by my hormones change. My OBGYN drug test me an I came out positive she mentioned in the hospital they would test me again an if I was positive I'd be having to deal with cps an I'm embarrassed because never did I ever mentioned it to no one I felt they would see me different an give me there opinion an would make me feel worst. Dr. I'm looking for a solution of how to detox my body from the THC I've consumed but I'm afraid to take the wrong methods. If you can be kind an explain what is the proper way an harmless to my baby to get rid of the THC ?