Endometrium thickness

Emily

Has anyone had their Endometrium thickness measured? I had an ultrasound last September due to horrible abdominal pain. It showed that the thickness of my endo was 18.4 . I have had 3 doctors tell me it’s alittle thick for my age and one tell me it’s normal. I just turned 20 in april. I am kind of confused. I don’t know if I should be concerned or not?