I was also taking progesterone w/ my pg as we conceived through IVF. I always thought that if you went through IVF you had to take prog supplements for at least 12 weeks because your body wouldn't produce enough on it's own. However, my dr told me I could stop taking it at 8 weeks & everything is still going fine. I had an extra week of pills left, so I actually didn't stop until 9 weeks (I'm 11 weeks now). Like you, I was very scared to stop. Has your dr tested your prog level recently? I believe as long as it is over 15, there is nothing to worry about. Maybe finding out your level would make you feel better. I'd say if you still have a week's supply left & if it would make you less anxious, it should be okay to continue taking it until you run out. Of course, if your dr told you to stop taking it, you should also be fine w/o it.