Prenatal appointment (long post)

Shelby • We have an August 16’ baby and April 20’ baby with some MC’s along the way. Baby #3 due March 22’

So I went in for my prenatal appointment yesterday, thinking I was anywhere from 7-9 weeks. My lmp was December 15th which would bring me to 8.6 and a due date of September 21st but with being somewhat irregular and glow saying my average cycle days are 40 it determined that my due date was October 3rd which would be 7 weeks. Well when my doctor did my measurements she measured my bean to be 6 weeks and we did not see a heartbeat. She said that it was too early to see one and to come back in two weeks to do an ultrasound.

My questions is: is that false and could I be at the beginning stages of a missed miscarriage?

Information you should know is: my last pregnancy almost 10 months ago ended in a missed miscarriage. Baby stopped growing at 8 weeks but my body didn’t start to recognize it until 12 weeks. Guys- I’m terrified.

Please post your past experiences if similar! Thank you in advanced!