Megsy I am sorry but what kind of crap doctors are these? how can they say something such as a cyst is "not treatable"? They always are as far as I know! I had many ovarium cysts and luckily I didn't need a surgery, but I DID need medication, which I took and seems that the cyst got dissolved in the blood.
Please go to the doctors as soon as possible, you are NOT wasting their time, it's your body, your health, and you have to be concerned. If they make you feel like you are wasting their times, I reckon you should maybe change doctors?
Careful also about finding information on the internet, you have many good and reliable websites, but others are just rubbish. Unfortunately I don't know of any website that I could indicate to you but I am sure other Ab users will be able to help. Let us know how is it going!!