Are there any ladies who have endometriosis? If so what pain relief do you use? I believe I could have endometriosis I'm just waiting to be seen by a doctor. I have irregular periods I have really bad cramping pains.The tops of my thighs ache ,I get really bad backaches in my lower spine to reduce the pain temporarily I take feminax. I haven't had a period yet I have taken a pregnancy test on the 17th and that came back negative.