Ovary pain?

Guinevere
I've got a question for ya'll.  Last weekend, I felt this intense pressure/pain in my left ovary??? It happened a couple times.  It wasn't horrible pain, but it didn't feel at all like the cramps that I can sometimes get.  (I'm the type to get cramps at all times of my cycle).  As I was saying before, I got pains a couple of times, but it was really more of an intense pressure, and I still feel a slight pressure every now and then (but that could just be me making it up) Has anyone else heard of something like this???? I've got a copper IUD, so maybe that has something to do with it??? I'm seeing the doctor next week.