Really good news that your heart is fine, the appointment sounds frustrating and stressful, as does not knowing why you are suffering these symptoms.
I hope that writing about it has helped you feel a bit better, I would agree that an official complaint might result in more stress and no resolution, although it's understandable that you would want to make one x
It is so hard to get answers as to what is a hormonal issue or something else - I have various odd symptoms that resemble vertigo for a minute or so, going completely weak and difficulty focussing. I have been told it is nothing to worry about but when pushed, my GP would not say it is hormones. In fact they have not attributed any of my odd symptoms to hormones. I have had an episode of really dry, red, swollen peeling lips and was told it was angioedema - it never happened again, burning red skin on my face, never happened again.
I guess I am relating to your feeling that getting to an understanding of whether things are hormonally related or not is so very hard. If everything else is ruled out, I guess you can make the assumption it is.
I do hope your GP comes up with some other ideas for you, so that you might be reassured and relieved of these episodes x