What progesterone are you on? As it's this that should be keeping your lining thin. Presume conti? Are you definitely meno or could this be your own period? Some topical oestrogen can be absorbed before the tissues are plumped up but negligeable after that. Not sure why you need to test your levels again as you can go by symptom control? All post menopausal bleeding should be investigated so I would see your GP and ask for a scan, you may have polyps or fibroids. And tell her about the bloating as you shouldn't have that either.