How my visit went...

So I just want to vent a little and maybe get some advice. Ive smoked pot here and there throughout my pregnancy and my doctor is aware. Ive firmly spoken my belief that pot is better than the anxiety meds prescribed to me. However I have also accepted the fact that I have to quit before baby is born and take the meds prescribed due to cps possibly getting involved. I just don't want to take the meds while pregnant as it is my main concern. Anyways I was monitored today for fetal movement (38w) and heart rate. The doctor seemed concerned because she want moving as much as she "should" which didn't worry me because she always does so when I haven't eaten or drank anything. But I didn't have time for breakfast this morning before the doctor. He said that the cannabis may be affecting the test results though as there is no way to tell if she is just sleeping and not moving because of that or if its because something is wrong. Everything was fine on the ultrasound as far as heart and fluid and blood flow. Besides movement. They gave me a sprite and she started doing just fine. Like I said i feel no concern at all. I don't feel like anything is different or wrong however he wants me to cone back in the morning to be monitored a second time to make sure. He also told me not to stress myself out and to just keep a kick count. Everything as far as movement went back to normal just as it usually does after I ate once I left the doctor as I expected. If the test results come back tomorrow no better than today's they will be taking further action to get labor going or do a c section if I prefer. Which kinda excites me as im so ready for her to be here. He also said my cervix is half a cm and about 60 percent thinned. Im also curious as to what happens when your 100 percent thinned? Does that mean ill go into labor soon? I really want to naturally go into labor before he says "lets get things going"