I Am 37 Weeks Pregnant And Have Ulcerative Colitis So

I am 37 weeks pregnant and have ulcerative colitis so was a heavy smoker of marijuana to deal with pain, nausea, and a lack of an appetite til about 2 weeks ago when my doctor told me I tested positive for THC and the repercussions of that as far as CPS is concerned. I am concerned for my baby and don't smoke anymore but I am wondering how long it will take to clean mine n the baby's system.