I am having the same problem and I am about mid cycle. The pain isn't on any particular side but it's lower abdominal pain. I've had some stomache aching this week and then when I had sex it felt like when your period is close and things are sensitive. Almost like running into something inside though, and then last night it was horrible! It hurt even worse during sex, and then afterword I thought I would die! I was on the floor and it felt like I was having spasms inside around where my uterus is. When I stood it put pressure on the whole area and it was just awful. I'm so sore today and I'm wondering if you found out anything about it, my dr is out for two weeks! I have endometriosis but it has never felt like this. You are right though, it hurts so bad to go to the bathroom...it's so much pressure. I would love to know if you have found out anything that could help me too. Thanks