Hello schapman and welcome to MM!
Just to say that I started perimenopause around 40 (45 now), and when symptoms got really bad at 43 , I started HRT. My FSH then was 10, so not really indicative as to how severe the symptoms might be! I suffered awful anxiety and panic attacks, also my cycle have shortened, and I had night sweats, palpitations and poor sleep. HRT resolved all that.
My advice is to see a specialist and explain all your symptoms, also enotional ones that you might not attribute to menopause at first (I was like that). Maybe a low dose HRT is all you need to go over the edge and regain welbeing. As time progresses, symptoms worsen especially at younger age as we tend to need more estrogen (and progesterone) to function well.
Good luck
Milamam