Ovarian Cysts

Does anyone have any experience with ovarian cysts/other growths in that area? I've had a cyst on my right ovary since I was around 17, and now I'm 20 and they've found that the cyst has grown rather large. It causes me pain most of the day every day, and I'm currently on day 40 of having my period. I'm currently waiting on hospital appointments and things, but does anyone have any experience like mine they'd be willing to share? Thanks 🙂