I had a scan a few days ago due to having bleeding so I was referred to the early pregnancy unit for an ultrasound scan. I should have been measuring approx 9-10 weeks but they said I was only 5-6 weeks!! My cycles are long (35 days) but I don't understand how my dates can be so far out? Couldn't see fetel heartbeat as it was too small. Got another scan on Wednesday to see if the growth has changed or if I'm going to have a miscarriage. Has anyone experienced this before? I've had 2 children already and I've only ever been a maximum of a week out on dates before! Feeling worried.