Oh Sparkle, talk about juggling madly! You do make me laugh though, a sense of humour and a sharp sense of irony really eases the load! Incidentally my husband has told me that my donor card has been cancelled (bet they'll want my football ovaries though!).
They tried to treat my migraines with HRT so it is possible, though it was a complete disaster for me. Mine are migraine with aura and the aura varies with every attack, sometimes present sometimes not. My aura symptoms can be visual but I also get pins and needles and numbness around the left side of my face, I get a phantom smell (yep, I know, completely barking!!) which is always the same and is vile like exhaust fumes, difficulty with language and slurred speech, my brain disengages so can't think. It seems to be a sensory thing so your changes in taste and smell could be an aura symptom but equally could be the symptoms of prodrome which are many.
They will absolutely not allow the contraceptive pill as migraine with aura makes you more susceptible to ischaemic stroke as does the combined pill, though I think they may allow progesterone only ones (can't remember the detail - too long ago!) My daughter can't take the pill. However, I seem to remember that the risk with HRT is different, well it must be because that's how they tried to treat me. It just didn't work and it affected me for a very long time after it was stopped.
If I were you, given all the problems you have had to juggle over the years and your very obvious sensitivity to hormone change, I'd wait and see how the flushes progress. Mine seemed to morph constantly, sometimes much easier to handle than others. maybe it's like everything else our bodies can adjust. Who knows, it seems the medics don't!
My husband suggested attaching tennis balls to the back of my pjs to stop me rolling onto my back. DUH!! xx