I Just Took A Home Test An Found Out I

i just took a home test an found out i am pregnant i have used marijuana before i knew i was pregnant I HAVE QUIT as soon as i found out but would like to make sure my system is clean before i got to doctor dont want to lose my baby over this not regular smoker was just stressed at time friend offered but i am over weight so it will prob be a while before my systems cleans naturally an i want to get to doctor asap i have already started taking prenatals as well