Yes definitely sounds endo-related. You must press for an appointment with a gynaecologist and u can't go on like this! I am sorry you are having these problems. Here are some websites which might be helpful to you:
www.endometriosis.org.uk www.endo-resolved.com www.endometriosis.org
All these websites have info on symptoms. It really sounds likely that you need a laparoscopy to have a look what's going on in there, and to treat any endo if found.
I find it very tiring too, and have had a laparoscopy and laser treatment which has helped, but I know what you mean about pain, though mine isn't/wasn't so much to do with urinary area.
Perhaps one of the women has a similar experience??
Hope you get helped very soon, and don't be scared to push for more! xx