Measuring a week behind.

Paige • Premie mamma; Adalynn Jean 💖🎀👑 Brooklynn Lee 💖🎀👑, baby #3 December 3, 2021
Last night I spend the night in the hospital due to severe pains and spotting. They ran a bunch of tests and everything seemed to be fine. When the did an ultrasound they found the babies heartbeat but only the my said I was only 5 weeks. I'm confused as to all other doctors said I should be about 6.5 weeks. Is this normal or am I just over reacting?