7cm “simple” left ovarian cyst ⚠️

Went for my first ultrasound today and got to hear babies heart beat and measurements and

Measured at exactly what I thought! 7 weeks 3 days and baby’s heartbeat was 156 so she was happy!

She did however find a ‘simple cyst’ on my left ovary. It’s 7cm!!! Which I think is massive! But she said she wasn’t overly worried as these cysts can disappear on their own! She did also say it was benign and full of fluid which I suppose is meant to calm me down but I’m

Still thinking alarm bells!! I dont feel like I’ve anything there, no pain at all.

Has anyone else had anything similar? And what were your experiences??