Does Subutex Intake During Pregnancy Show Up In Urine Test Result?

I am 34 weeks pregnant and been taking 10-15mg a day of lortab for several months, (prescribed to me by my ob). I have been tapering to get get me off of them before the baby is born and on Monday started to experience withdrawal and took one of my sisters subutex. Will the subutex still be in my system on Friday for my ob's urine tox screen? How long will the subutex stay in my baby's system after he is born? They will probably test his umbilical cord or his first poop. I am 37 years old, weigh 153lbs and 5 feet tall.