Ovarian Cyst

I had my first ultrasound Friday :)
Baby was measuring at 9 weeks on the dot. They also measured and took photos of a large cyst on my right ovary. Turns out that's what is causing the majority of my pain, not round ligament pain. 
Does anyone have this happening or any experience with this? I have PCOS so I know that's a contributing factor. Just wondering if I should be concerned.