I am also part of the prolonged bleeding gang. mine has been going on and off since the start of November. It was very light to start with and by the third week had built up to the point where I was a bit worried I was hemorrhaging and then tapered off after the first week of December - 5 weeks in all. I then had about 2 and a half weeks off with only one day of spotting and then it's been back on again. Once again I'm on about my 3rd week and I'm changing tampons about every 15 minutes or so. This is the only time I've felt at all sick (just a bit shaky). There's been no pain and I haven't felt sick in any other way.
Oh, and for statistics, I'm 36, I've never been on the pill and my period up until now has been normal except for when I was younger it used to be more painful. No kids, not currently sexually active (thank god) but was until about 6 weeks before this all started.
I've read this forum before (the last time the bleeding got really heavy including blood clots) and it reassured me that I wasn't alone and that my choice not to go to a doctor is a valid one considering no-one else here seems to have been diagnosed with anything. But I had forgotten how scary it could get when the bleeding gets really intense. On the other hand, I didn't die last time. And the weirdest thing is that generally there don't seem to be any physical side-effects at all (other than those things that were already there).
This is getting long. So, anyone want to compare notes as to what mental or emotional triggers could be connected? Several people have mentioned stressful situations. Just looking for another way to look at this as I suspect looking for a purely physical reason isn't going to work.