Thanks so much for all the replies everyone. Really interesting to hear your experiences.
So, here's what happened - the GP said I do sound like a prime candidate for testosterone, but she's not able to prescribe it. Luckily though, she said another GP at the practice specialises in menopause and they can.
Next step is I have to go in for a blood test. After that I'll see the meno GP.
I'm a bit concerned because I hear the blood tests are not reliable and we all know hormone levels can fluctuate wildly day-to-day, even through the day.
But they didn't dismiss me, so here's hoping.
Will keep you updated.