I'm 45 and for the past 3 years I've had intermittent bouts of irregular bleeding, i.e. My period this month was 2 weeks over due, then it'd last for 6 days, 3 days longer than usual then another would arrive 2 weeks later. My period tracker is all over the shop!!!
I'm putting on weight like a sumo in training, my body aches so much, every muscle so getting exercise is a total bore ( where as 3 years ago I was hooked on the gym ), I can't think straight, I can't form a sentence some days, my mood swings are horrendous ( I've just sobbed for half an hour because I read something really sad) I'm making my husbands life a living hell with my anxiety towards me trusting him ( though that could be an actual issue but normally I'd shrug it off ). I can't work, I can't even do a good job cleaning the house because my brain is mush and everything hurts. I'm sleeping ok, generally feel exhausted at the end of the day and not suffering night sweats.
It's grim.
Now is this the menopause? I'm so confused! What is the peri menopause? Is that just the build up before periods stop? Once they've stopped do things get better? I've read so much and I'm really none the wiser! Can someone just draw a really simple diagram for me? 
I'm going to the docs tomorrow because my symptoms are so similar to a few years ago when the doctor started to question if I had MS. The physical exhaustion is consuming me as well as the speech issues. It's like a flare up OR this is just the menopause.......urgh! Confused!!