I think that everyone is a bit different and get different symptoms at different times. Boy...what a lot of differents.
Both my sister and I started with immediately getting lighter periods at the same time that we developed anxiety, tingling/numbness in our hands and feet, nausea, dizziness and exhaustion. We developed it at different ages though. She developed the first symptoms at an age 5 years younger than where it all began for me. I seem to be following more along the same lines as my mother who started with symptoms in her mid 40's and had her last period at 52.
I haven't developed any hot flushes yet. I'm guessing that will happen when my period actually stops. That's when it happened for my sister. She's only getting a period once every 5-6 months now and in between, she is plagued with hot flushes.