If I see the shedded uterus lining while menstruating, does that mean I don't have Endometriosis?

Because I heard that if you have that particular disease, it prevents the uterus lining from coming out.If I see the shedded uterus lining while menstruating, does that mean I don't have Endometriosis?
What do you mean that you see the shed uterus lining? You may be seeing a clot, formed when your body's blood thinning hormones do not work quickly enough to thin the blood before it passes from your body. You may also be seeing dead white blood cells or dead cells from your vaginal walls that are sloughed off during menstruation. Your menstral blood IS the lining of your uterus. If you mean that you see pieces of your uterus (the actual organ) coming out of your vagina you need to go to the hospital. Read your biology textbook as a bedtime story tonight.
Your menstrual flow IS your uterine lining being shed.
Endometriosis doesn't prevent the uterine lining from being shed. Endometriosis is an illness in which small bits of uterine lining also grow outside of the uterus. This tissue acts in the same manner as does the identical tissue growing in the proper place, but if it's outside of the uterus, there is no way for the lining to escape from the abdominal cavity.
You might want to check this on a legitimate medical website. I'd suggest the one below, which has excellent information in plain language.
Endometriosis is endometrial lining of the uterus growing OUTSIDE the uterus in the pelvis. It will adhear to ovaries and fallopian tubes.