Hi Poco - I'm 44 and in the same boat as you. I had a period in early December. It lasted longer than usual and then I got it again around December 18 and it lasted 7 days. Now I'm not sure which days to count to see if when my next period will come. I think it means the change is coming on. I've also had soaking night sweats during this time period.
Thanks for your comment. I dont think i've been having hot flashes, i think I would notice. I'm going to have blood work done just to see if anythings wrong, otherwise as long as I can take it, I'd rather let it run it's natural course, but we'll see. Sometimes the irritability, fatigue, and mood swings can really be draining. Good luck to you.