nearly50, I'm racking my brains. At what point in your cycle did you have your bloods done, I can't remember? Hormone tests are ideally done on day 3-5 of a cycle, but I don't think yours were, am I right? Sorry brain's a little addled today, as I remember your oestrogen was high but they summarised the readings as inconclusive (cop out statement!), is that right?
I've never had flushes coinciding with high oestrogen it's always one or the other with me. However the scientific understanding of flushes is still sketchy, and again experience of flushes can differ between women. They seem agreed that all it needs is a drop in oestrogen to trigger flushes. I think I wondered to you at the time, that maybe your oestrogen was super high and had dropped a little which may nave been enough to trigger the flushes but still give a high reading for your test result.
If the bleeding continues regularly to be very heavy I'd be tempted to try the tranexamic acid again. I would make sure everything was tried before doing the hyster route. If you need to have it fine, if you don't, explore every other avenue. As far as pain relief is concerned, from experience Mefenamic acid seems to be the very best option. It's an NSAID and only available on prescription.
Load up with a couple of towels tonight and go and enjoy yourself, it'll take your mind off of everything xx