Endometriosis can be painful, but not always, but the cysts
shouldn't cause any problems, unless they are not normal cysts
a menopausal state.
As for the black outs, I've never heard of that happening to someone, but it could happen if the pain is really bad. I quickly pulled that out of my school book. I would just make sure that the doctor knows about the black outs.
There is way besides surgery to really diagnose endometriosis besides the menopausal state.