the same thing happened to my mum. She fainted from the Endo, they rushed her to hospital and when they operated on her they opened her up took one look, obviously took some samples or something, then closed her up. When she woke they told her and my dad she had cancer and it would be a miracle if she lived to see xmas (which was 3 months away) A few days later they came back and said she had Endo and it was getting ready to attack her organs. She was only 31. She ended up having a full hysterectomy, then had to have a double colostomy as well. So she had it pretty bad. It plays on my mind a bit that i might have it as well but because i was too young nothing was done. My GP had the referal done up for me to have a laparoscopy done (5 yrs ago), then i found out i was pregnant so didnt need it. But it still plays on my mind from time to time.
Anyway hopefully you wont be needing that appointment anyway hey?
Nic