Hi Daisybunny,
I'm not sure, but my doctor said the Mirena can make you bleed because it gets rid of anything that is still there, perhaps you had some lining still there but not enough for a bleed, but once the Mirena was inserted it's just getting rid of that tiny bit. .I'm no expert and I'm sure someone else might know on here, but I'd give it 2 more weeks then go see your GP if you're worried.
This menopause is a right lark isn't it 🙄