You are already a good mom to stop the weed and to take care of your baby. Remember to never go back to using regularly as babies need present parents that aren't high to be properly cared for. So, the THC should be out of your system by the time you give birth. Were you up front with your doctor? That's always a good idea. Then they know. And even IF they test you because you admitted to being a heavy pot user early in pregnant, it won't matter because you are clean. Even IF they then do some home visits to check up on things after you give birth, you should be okay with that too as it is within a child's best interest to have sober parents and you as a good mama will be sober so they can check all they want. :>) You should be clean, your baby should be clean and hopefully all will stay that way. Congrats on the pregnancy and hope it is going well. You are 16 weeks now. You have a long way to go. How are you feeling?? Are you going to find out if you are having a boy or girl?