I don't have CF, I'm just a carrier, but I have quite a bit of experience with endometriosis. I was diagnosed 12 years ago. My symptoms are currently pretty mild and have been since I got pregnant with my last daughter. Before that, most of my issues occurred around the time of my period. The most difficult to deal with was the horrific cramps. I can tell you that every case of endometriosis is different so some people who have severe cases feel little discomfort and others who have mild cases can be in great pain.