Hello,
From my online research, I've found the following that could be symptoms:

Pain before and during periods
Pain with intercourse
General, chronic pelvic pain throughout the month
Low back pain
Heavy and/or irregular periods
Painful bowel movements, especially during menstruation
Painful urination during menstruation
Fatigue
Infertility
Diarrhoea or constipation

Of course, some women with endo may not show any symptoms, but others may have all the symptoms. From my understanding, the only way to diagnose endo 100% is by laparoscopy.

I suggest you make an appointment with your ob/gyn and discuss your symptoms if you are having any. Good luck!