Hi and welcome to MM Mutley
If you are still getting periods then you are actually peri menopausal - to be post meno you need to be period free for well over a year or over 54 to be deemed post meno. Sometimes blood tests done at the wrong time can show a 'post meno' reading but in peri meno the hormone levels fluctuate greatly so this makes blood tests really unreliable. I would ask for a referral to a meno clinic or gynae for some more specialist advice.
Do read up all the info on this site to get clued up.
If your womb lining is thickened and causing heavy and prolonged bleeding, then a Mirena would help keep your lining thin and you could then have oestrogen as patch or gel to help reduce flushes and protect you heart, bones and prevent vaginal atrophy and bladder problems.
DG x