There shouldn't be any problems. If you've been healthy otherwise. Eating right etc.
Her weight and measurements are right on track, I just worrry about her mental development after she's born
I have never read a real bad correlation between weed and a fetus. You should be okay. Just simmer down.
Your baby will be fine. I would just stop now becuase when you go into labor they drug test the babies at the hospital atleast they do where i live.
I know plenty of women who smoked marijuana while pregnant. I have a couple times but I try not to. All the babies have come out great and one is even making Olympic qualifying scores in swimming (we might see her in 2016). I have read it can affect growth but if your baby is the proper size then I wouldn't worry.