Advice ladies? Cyst found on my Overy

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So i when for a early scan today everything looking good woth baby 8 weeks 5 days But as she was checking everything else she had found a cyst on my left Overy size greater then 5cm ive been told to mention it to gp and they will keep an eye on it but. Now im frecking out google hasnt helped has any one had any experience with this or know anything