Thanks for raising this issue, the comments really resonate with me. I didn't know what it was for ages. I haven't really been an anxious person as such. A bit of a ruminator but nothing that held me back.
Since perimenopause hit several years ago, I can be fine one minute and highly anxious the next. It usually comes along with feeling a bit paranoid and irrational. It isn't usually accompanied by all the physical symptoms like raised heart rate etc, with the exception of butterflies which is my other main symptom. It is just horrible and at times life limiting.
I believe in my case, it is hormone related, but hasn't been fully 'cured' by hrt although seems better. I am learning to live with it. Recognising it and labelling it helps me to cope as well as being kind to myself. This isn't our fault.