Hello, thanykou for asking your question. your doctor saw highly built up endometrial ling and thinky there might also be a polyp in the uterus. These are things that you can still get even though you live a very healthy life. Sometimes thick endometrium looks like a polyp and so what the doctor is trying to do is to check after the endometrial lining has belad off - to see if the polyp-looking area is still there. It coud dissappear after progesterone - would make the endometrium break away - and bleed - but a polyp wouldn`t be affected by proegesterone. If you miss a perod - often you can have higly built up endometrail lining follwoed by a heavy period. Some premneopausal women ( 40/42 + ) have what we call an estrogene dominance - with heavy periods, swolen breasts... It sound like you might have just had an irregular cycle - missing a period and having the next one heavier - tis happens often in premenopause times. There`s nothing much you can do, don`t worry, most polyps turn out not to be polyps but just highly built up endometrum. If it is a polyp it`ll be removed - ( D&C - Dilatation and Cürttetage - jus to be sure) - Mostly it`s nothing to worry about at all. Often periods/cycles will turn back to normal. kidn regards, JR