Do you have irregular periods? If you're really 10 weeks, then the dr should have been able to see the baby. But perhaps you're just not as far along as you think.
I had an ultrasound done at 7 weeks. I saw baby and heard a heart beat. Good luck. I hope everything's ok!
I had an internal ultrasound at 8 weeks and we could see the baby and hear the heartbeat. Good luck my prayers are with you.