8 week u/s measuring 6 weeks 3 days no heartbeat

Went in for our 8 week ultrasound and the tech told us we were measuring 2 weeks less and she couldn't see a heartbeat. The doctor scheduled us for another u/s exactly a week later but said it looks like we lost the baby.... we had been trying to conceive for just over 2 years and I was on clomid so I am fairly sure of my ovulation date... I can't help but feel completely defeated. And the thought of going through the stress of trying again is heartbreaking.