I had a missed m/c at 11 weeks. I had NO idea anyting was wrong, even when I was getting some brownish discharge. It wasn't til I started bleeding a few days later that I panicked. Even then I convinced myself that it might be nothing. We found out later that day at an ultrasound, but it was a big shock to us.

Don't worry about anyone thinking you're stupid - apart from the fact that they won't, your well-being is more important than what they think. I hope you've called the Dr and managed to get an appt for a BT or scan.

Good luck hun.