So i nust found out that I am pregnant with my 3rd child. But I'm 33 weeks pregnant. I had a regular period the whole time didnt gain any weight and felt no fetal movement the whole time. The only reason i found out was i went to the Dr for pain in my kidneys which turned out to be kidney stones. What I'm worried about is that I am a marijuana user and with me not knowing until a couple days ago that I was pregnant is there any way for me to clear out my system before I go into labor and have the baby. Again I had no idea I was pregnant and if I did I wouldnt have been using.