Lavender, yes that sounds like a flush to me, regardless of whether you go pink with it. When I first started having symptoms in peri they were only in the 2nd half of my cycle, but within a few months that changed to all the time, though continued always to be worse in the 10 days or so running up to a bleed, however long the cycle & in the last 2 years periods were very erratic, some many months apart. I found the last 2-3 days immediately before a period were the absolute worst for symptoms.
If you don't do it already & would find it helpful/reassuring, you could maybe chart symptoms according to where you are in your cycle. I expect someone has already suggested that though.
Penguin, yes, Utrogestan also makes me too hot all the time, but really problematically so overnight - it really messed with my already rubbish sleep. It seems to be pretty much Marmite though - my body absolutely hates it, but as we see on here many women report feeling calm, better for it & that it improves their sleep. I wish I were among them! I saw someone mention on here recently they'd read that the way we respond to progesterone may depend on genetics, which made me feel a bit better!
Wx