I'm scared

Hello ladies. I'm looking for anyone who may be able to relate to my situation. I was diagnosed with stage two five years ago. It was burnt off and I went on my way. They found it on my right ovary and my ureters. I have been on a course of prostap over a year ago with slight improvement but my issue has always been pain. I am on 100mg mst. My recent worry that is really making me so concerned is that I have not had a period it four months. I have always had a monthly period so this very sudden. When I had an ultrasound a few months ago she found a small cyst on my ovary that she said she was not at all concerned about but I was booked in for a lap to see whats going on. That is in two weeks and I have been experiencing increased pain on both sides of my womb, almost deffo both ovaries, the bloating is terrible and also new to me and the pain nearly sent me to a and e. Oramorph just about dulled it down enough. Does anyone have a clue what is happening? I am so scared right now that it's ovarian cancer because its so different to normal. I'm petrified. Any advice would be welcomed. xxx