Thanks Floo and Hurdity, I googled low oestrogen symptoms and definitely ticked most, if not all, boxes! I've sent an e-consult to my surgery asking if my patches could be changed to 75's, so fingers crossed. I've actually stuck another 50mcg patch on in the meantime (naughty, I know) but I feel so much better for it!
Hurdity, it has been a while since my last breakthrough bleed - there's been a few since my first mirena coil fitting approx 6 years ago - the hot flushes certainly took me by surprise, as did the sore boobs! I would be so chuffed if this was a last fling for my ovaries - suppose time will tell!
Thanks again.