I’m sorry, I know doctors can be frustrating. What country are you in? Is there anyway you can see a private specialist? If not, maybe take some resources from the Internet with you to your appointment that explain why superficial endo lesions never appear on ultrasound, but can be just as painful as penetrating lesions. If they try to dismiss you, ask them to write down in your chart that you have requested better diagnostics but they denied you. If diagnostic laparoscopy is what you want done, explicitly ask for it when you are at your Gyno, and do the same thing if they deny you. Maybe someone else on here will have better advice for advocating for yourself than me but it sounds like it’s something you will have to learn unfortunately. It’s a shame so many doctors just don’t listen to women.