Gnatty, already on magnesium bisglycinate 400mg/day.
Scampidoodle, my low histamine diet made zero change to my symptoms. I am taking quercetin 2x daily anyway, but I don't think it's histamine. Can histamine cause high blood pressure? Why would my REALLY STRICT(!) low histamine gross tasting diet not have helped?? I have some DAO but I haven't even tried taking it yet. Maybe I will start to take it before meals and see if it helps at all. (I do think I had a slight allergy to cow's dairy, since I have been on sheep and goats dairy only for a couple weeks and my runny nose and watery eye appear to have stopped - gee - how many suboptimal things do I have going on?? I thought that was low estrogen too, but turns out to be cows dairy - thanks Lara Briden for that one... )
SO - AN UPDATE!! Today I saw this new GP and SHE WAS EXCELLENT!! She didn't have all the answers for everything I'm experiencing, but she LISTENED, she was quiet and attentive, she wasn't a big personality, and she really thought about things and we both sat there unable to make sense of my "why is this happening?" question.
As I said above, I didn't plan to tell her about the blood pressure and palps today - because I thought that would be too much to go into. But I mentioned it in explaining why I'd had to reduce my estrogen to 25 patch - due to estrogen side effects. And she wanted to know more.... So I told her everything.
She took my blood pressure which was 163/90 or something horrendous. She took it twice. The irregular pulse icon was on. I said that always comes on, when I use my home blood pressure machine too. She listened to my heart and said I have a lot of ectopic beats. She said that can be normal, but it's a lot. That's why the icon is coming on.
We talked about this all beginning since I started HRT in March. And that it gets worse, the more estrogen I take - and better, the less I take. And that the same thing happened when I was 21yo and went on a combined pill.
We stared at each other in shared complete lack of comprehension about why this is body identical estrogen, the same stuff my own body makes, and I am only on a really low patch at the moment - and it's still happening. Even if I don't need this patch, I should be able to take 25mcg of additional estrogen without all this... it's very safe stuff(!).
So the upshot of what we decided was: I am to come off all patches/estrogen and see what happens. I have already ripped the patch off

I am to have a review with her in 4 weeks. If all this is still happening then, I need a cardiology referral. Because maybe it's just a coincidence that it is happening now, having started estrogen. Maybe I have some heart stuff going on.
If it stops and I don't need additional estrogen now (because my ovaries are making some, now I've come off desogestrel) then everything is great - for now. It's not going to be great when I do go through menopause and I do need estrogen... I might have to just accept I can only have a very very low dose of it and hope that is enough for SOME protective health benefits.
If the cardio symptoms stop and I get peri symptoms back and need estrogen now, then I need a referral to gynaecology who will help me - there are some other meds which can treat symptoms, although of course they won't have the same health benefits as estrogen.
And then... With the discharge situation, she said the pale colour was fine and she couldn't see any sign of LS or LP. She said the cervix and vagina looked fine. She did a swab for thrush and BV but she said she doesn't think it's either. She thinks it is probably just my own discharge starting up again now I'm on estrogen and have stopped desogestrel and maybe now my ovaries are being more active - even though I'm still on 200mg of utrogestan.
I'm not sure about that, because why am I getting burning and stinging in the vulva and why does the discharge feel acidic when it comes out... She didn't seem to know much about vaginitis-es and other things this could be. So we have decided I can have daily Vagifem for some months because it seems to be pretty much fixed with Vagifem(!), but if I need Vagifem daily ongoing then I will have a referral to gynae to be sure nothing else vaginitis-like is going on, and to approve that because it's off licence. Or maybe I can get an e-string.
Lastly she asked about my thyroid as a possible cause. And I told her I'd had TSH and free T4 done and that was all they would do. But I think I am now going to do the Medichecks 'everything' thyroid panel including thyroid antibodies, just to be sure.
So - no magic answers or solutions, but I've taken the patch off and now we shall see what happens. It might be a few weeks because the palps and blood pressure took about 2-3 weeks to start up when I began HRT, so it might not be a quick change...