10 week 1 day scan.. 1.2mm pocket fluid on spine?

Provider is having me come back in 2 weeks for recheck. Said she sees it commonly at this stage in pregnancy and most of the time clears up on its own. Says everything else looks great. Based on how the brain looks and how active the baby was (kept saying he/she was cha-cha-ing), she's not concerned but just wants to follow-up.....good and bad. Going to try to focus on the positive but still makes me a little nervous.

Just looking for any reassurance from people in similar situations?