Tinkerbell,
My symptoms were long periods(7 days or more), severe menstrual cramps that couldn't be touched by over the counter pain releivers (I had a doctor tell me, when I was 17, that I could take four Advil at a time as long as I never took more than 12 in a day. Very helpful...not!) Over the last two years I started to experience severe abdominal, and back pain.
You do not need to have all of these symptoms (and I sincerely hope you don't.) One medical web site that I read said that some women have this problem for years and experience no symptoms. In these cases, it is usually diagnosed because the woman is unable to get pregnant and the doctor has ruled out all other causes.
The bad thing is the only way to diagnose endometriosis is to have an exploratory Laproscopy. On the up side, the doctor can treat the endo during the laproscopy and you don't have to have two surgeries. I had mine done Feb. 23. It's an out patient procedure and the incisions are very small. I have a small line in my belly button and a small scar on my lower abdomen(the scar is because my stiches pulled out, normally there are only two thin 1 inch lines). There are several sites that have more information about this procedure and all of the Endo sites that I have been on have references to laproscopy. The nice thing is that you aren't out of comission very long. I had my surgery on a Friday and was at work on Monday. Within two weeks I was riding horses again.
I hope I haven't scared you about this, but the other side of endometriosis is that if it is let go it can damage your internal organs. I have a lot of problems with adhesions on my intestines (very unpleasant and painful) and scaring on my right fallopian tube(decreasing my chances of getting pregnant, as if pcos on its own wasn't bad enough.) The earlier you catch this problem the better off you are.
I would seriously discuss this with your doctor and find out how serious he was about his comment that you may have endo. The other thing I suggest is that you go online and surf for information. I am putting in a few sites that I have been to. I know that reading about, and understanding what endometriosis was helped me to cope.
www.endometirosis.org
www.centerforendo.com
www.pelvicpain.com -- this site was a private doctors site but it has video clips and pictures that may be helpful, if your into that sort of thing.(My biology interest at its worst.)
Most of all good luck and take care of yourself.