I will go first to get things started...
1) My symptoms are palpitations which are fluttery in the top of my chest. My doctor described them as 'ectopic beats'. They are not just a little flutter and then stopping, they go on and on for literally hours - it reached the point where they were constant, all day and all night. My back felt like it was crawling from the constant sensation. I also had high blood pressure which got progressively worse the longer I stayed on estrogen. The highest was 163/90 at the doctors (25 patch). Before that I had 158/90 at A&E (50 patch). My usual blood pressure is around 105/65 and I am very fit and workout regularly. I did get some lower and more normal readings when I tested at home for a week, but I can tell that on average things were very different and something weird was going on - even if doctors didn't seem too bothered. I was constantly pulsating, throbbing and pulsing. It was extremely distracting. My heart would beat harder and faster than usual, especially lying in bed and trying to sleep. I would often startle from sleep or wake early, especially on the higher doses of estrogen. Everything was much worse at night, leading to very little sleep.
2) No, I did not have any of these symptoms before starting HRT. The only symptom I had is the classic 'skipped beat' feeling, when my heart would very occasionally suddenly beat 2 beats harder than usual. This was not the same palpitation I had after starting HRT, which was a fluttery sensation that would go on for hours.
3) Yes, I took a combined pill when I was 21yo - Microgynon. And yes, I had similar symptoms then. My blood pressure was raised when I went back to my doctor about it and I also felt I was pulsing and throbbing at night. I didn't stay on it for long and switched to a progesterone only pill (Norgeston) which had the same progesterone in it as Microgynon. I was totally fine on the POP and have been on Norgeston and desogestrel POPs most of my adult life with no issues.
4) I believe I was fine for the first 2 weeks on a 25mcg patch. After one week on the 50mcg patch, the symptoms began. I don't know if this was just about time on any estrogen rather than the dose increase. At the time I was very preoccupied with my endo and whether it would or wouldn't return on HRT, so I wasn't really focussing on my cardio symptoms and didn't really think about them. I was told they would settle with time and ignored them. So I am not really sure how they developed but they got unbearable when I increased to 75. A week after increasing to 75mcg, I went to A&E. I then reduced to 62.5 for 6 weeks but things did not change much. I reduced to 50mcg, then to 37.5mcg for several weeks. And eventually down to 25mcg. None of this worked. It wasn't as extreme as at 75mcg, but the longer I stayed on any of it, the worse and more ongoing all the symptoms became. (Ie - rather than just being at night, they were all day and night).
5) As above - tried reducing estrogen. Didn't work. I take magnesium bisgycinate. Doctors at the time just advised me to continue taking HRT and that it would settle. Some doctors advised reducing estrogen (which I was already doing). No one seemed to have any definitive answers for why this was happening to me.
6) I had an ECG run when I went to A&E. It was normal. My GP listened to my chest and said I had a lot of ectopic beats constantly. My blood pressure was raised on average and overall and had very high readings sometimes - but because it wasn't constantly high, no one really seemed that bothered even though it is way higher than what is normal for me. I have been referred to a disrhythmia clinic but the referral has not yet come through.
7) No, I am no longer taking estrogen. I stopped a week ago. It has taken a long time for things to get better but I now am okay for many hours at a time, and then will have an episode again. Night times remain harder than day times but the pulsing is less. I feel like my body has been in this state for months (of tachycardia) and it is now used to doing this and it is hard to get out of it. I am hopeful this will go away totally with more time or some beta blockers to help.
8 ) Yes, I stopped taking estrogen. See above for where I am now. My doctors all seem to have no idea about any of this. I am very worried about having to go through menopause without being able to take estrogen, but I have had a reprieve because my own ovaries have started to work again since stopping the desogestrel pill. So now I have time to figure out what I am going to do, when the time comes.
9) Yes, I am hyper-mobile.
10) Yes, I have a history of mild endometriosis.
11) I have no skin symptoms. I have no known food intolerances, but I am prone to constipation and trapped wind.