Hello doctor, i am 51.10m old, my lmp is 24 august 2o15, before that was in august 8, 2o14. before that were after 7 months, i am worried that is this postmenopausal bleeding or perimenopause, i did my usg tvs, the endometrium thickness is 4mm. what should i do, is this ok, or i go for furthure investigation. and if again i have menses after few months its normal or i worry. kindly address my issues. thanks