For How Long Does Marijuana Stay In The System?

I am almost 37 weeks pregnant and I have smoked marijuana just about every day of my pregnancy. I know people have their own thoughts about marijuana and pregnancy. I just stopped today. I live in South Carolina. My question if I drink plenty of fluids will it show up when I deliver at the hospital? Will they test me? And would CPS get involved? Ive seen my doctor on a consistent basis and she has never brought up THC being in my urine.