Ovarian cyst - could it be ovarian cancer?

I'm only 19, so I know it's unlikely. But I googled my symptoms and it matched the symptoms of ovarian cancer.

-Abdominal bloating or swelling

-Quickly feeling full when eating

-Weight loss

-Discomfort in the pelvis area

-Changes in bowel habits, such as constipation

-A frequent need to urinate (this is the only one I don't currently have, but did a couple months ago)

I was at my boyfriends cottage over the weekend, and the second day we were there I had pain in my lower stomach and felt very nauseous. I had no appetite (it was thanksgiving) so I barely ate anything the entire weekend. The next day, it had gotten worse. We thought it might be my appendix (that's where the pain was) so I went to the hospital. The doctor did tests (urine, blood, temperate, etc) and he didn't think it was my appendix. He did an exam and it hurt a lot, he said it wasn't normal to hurt that much and said that he think's it's an ovarian cyst. He told me to go to my family doctor immediately when I got home and said to come back to the hospital if the pain got worse. My stomach hurt really bad later that night (my stomach area, not my ovaries) for hours but eventually I fell asleep. It didn't feel much better but I managed to drive home. I went to my doctor yesterday and she agreed she thinks it's a cyst. I'm going for an ultrasound on Friday but do you think this could be more than just a benign cyst? I also heard those don't usually cause symptoms or pain.