Along with the bleeding I passed clots. I did an ultrasound and found there is a gestational sac and yolk sac and a fetal pole, but no fetal heart beat?

Gestational age. Passing clots when you are pregnant is always a cause for concern. But, it doesnt always end badly. If you had your ultrasound early, less than 6 weeks, there may not be a hearbeat visible. you may need additional scans or lab testing to get the final answer.