i don't think you have anything to worry about...my friend smoked the whole time she was pregnant and had THC in her urine everytime she went to the doctor. They told her the risks of low bith weight on the baby, but her's was in the 95% of weight. Even after she was born they tested her and told her since it was only MJ that she could still breast feed. They told her that the law only gets involved if it is other types of drugs, if it's only MJ they don't worry about it...