5 months postpartum LEFT OVARY PAIN. Please help?!

Claire🌈🌸🌴 • Previous stillbirth 👣👼🏼 now Mother of 3💕

So I’m 5 months postpartum, after birth I went on the non hormonal coil. Once I got my first period after birth that’s when I started to notice this pain in my left ovary and Iv had the pain on and off every since. Iv been to the doctors and I had a scan internally on my ovary.. couldn’t find anything. The doctor thinks it could be the coil but I had the pain before the coil was fitted. The pain can vary from a dull pain to a very sharp pain where I’m on the floor in a ball. I’m meaning to go back to the doctors and get a second opinion but Iv just come on here to see if everyone as experienced the same.

I want to mention that before pregnancy I was on the depo injection for 7 years and didn’t have a period so didn’t have any pain whatsoever.

Anyone got any ideas what it could be?

Thank you