I have endometriosis so I'm used to pain but this is on another level. For about a week now and at various times of the day I've felt extreme pain in what feels like it might be my left ovary. It gets to the point where I can't stand up straight because it hurts so much. I've had it around the same time each evening and then sometimes through the day too. It lasts a few hours and then the pain goes again but I'm left feeling tender until the next lot of pain. Has anyone else experienced this?