I had a 9.5 cm ovarian tumor removed in May. (We thought it was a cyst caused by Clomid however after the surgery the pathology showed it was a pre-cancerous tumor)

I got my period in May and June like normal and everything was fine. The last two and a half weeks of July I started having a lot of cramping pain on the right side where my ovarian tumor was. I thought I was ovulating / then about to get my period. Over the two weeks it got so much more intense and is now at the point where when it comes I can’t move or breath until it goes away. My period is 10 days late and the pain is becoming more frequent. I already made an appointment with my OBGYN but I wanted to know if anybody else had a similar surgery and experienced something like this?