Has anyone else went to a ultrasound at 6 weeks and all they seen was the sac and the yolk sac? I was told to come back in 2 weeks for a rescan. I took clomid 100mg day 3-7. My last period was October 18th and Based on bbt and opk’s i ovulated on November 3rd. I believe I implanted on November 13th because I took a test on November 12th and it was negative. On November 14th I got my positive test. I had my first ultrasound on November 30th. The ultrasound tech said she couldn’t tell if it was twins because I wasn’t that far along. We only seen one sac. But won’t clomid twins have separate sacs? Here is pictures of my test everyday and my bbt chart.