Change your GP?
She is correct in that hormonal blood tests are reliably unreliable. However, she should have arranged for U to have routine blood tests for: low VitD levels, anaemia, thyroid function, although I understand that blood testing in some parts of England is in short supply.
Some find that keeping a mood/food/symptom diary of use to chart progress. Is there Nurse Practitioner or a GP with interest in women's health at your Practice?
U R not going mad! Peri-menopause begins 10 years prior to the last monthly period, literally, menopause. My periods waxed and waned for several years. I was already on ADs and anti-anxiety medications which helped (from 1988). I had various itchy spots, the main being my insteps. I would take off my socks at night B4 stepping in2 the bath and my feet would itch++. I sometimes wake with one heel scratching the other!
As oestrogen levels drop off the body may become dry: inside and out; skin, scalp, eyes, deep in the ears, vagina ....... and muscles may become lax = aches and pains.
Browse round. Make notes. Most of what you describe has been discussed here over the years.