What are the signs for Ovarian cancer?

About 4 days I noticed a pain down my lower right pelvic area. The next day is kind of went away, than I felt pain in my lower back with the right lower pain as well. It was hard for me to stand on my right leg because of the pressure it was putting on my right lower side and back. It lasted for about 3 days. Now I feel a litte better. I noticed thick discharge too which is also gone. My appetite seems to have change and also my BM as well. I'm not fully bloated. I just don't know if it's because I really need to drink more water OR I should excersie more often? Last night I could feel my lower back in pain and there was also my right leg off and on. Has anyone ever had a symptom like this?