Gestational sac bigger than fetus?

su

So according to my LMP I’m 6w6d. I did my first scan yesterday & the tech said the gestational sac is measuring 7w1d however the fetus is 6w1d. Did get to see the heartbeat & it was 116bpm 💗

I’m so confused though! Is the size of the gestational sac something to worry about?

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