one week behind

kirsten • Married for 4 years. Currently have a one year old princess💜 and a 1 week old prince💙
I went to my first OB appointment today. I was supposed to be 6w/6d but ended up measuring 5w/6d. My doctor didn't seem concerned and we could see a heartbeat but couldn't hear it yet. Have any of you ladies had this? I'm not too worried, just curious.