Pregnancy and natural marijuana cleanse?

Now before anyone begins to jump down my throat, I just found out I'm pregnant today. It was completely unexpected and unplanned; if I had known or if we had been trying, I definitely would not have been smoking. But I have been smoking marijuana almost daily for awhile now. I've heard you can do some kind of natural body cleanse to remove the THC toxins that are stored in your fat cells. Is that true? And if it is, is there any kind that is safe to use during pregnancy, that will not harm my baby?