Thanks for all your replies. For the previous 6 years (up until last October), I'd had flooding, lasting for 3 months at a time, and was referred to a women's unit at the hospital - I've had scans, blood tests, womb biopsies (incredibly painful - I had 5 in total, and everything always came back as normal. I had a coil - got it taken out after 2 weeks as I had such a lot of pelvic pain with it. I'd been on Provera and Norethisterone, on and off, for 6 years.
I'm just hoping that the tender nipples, mood swings and tiredness don't mean the start of any periods.... I've got a GP appointment - 25th Sept., which is the earliest one available.