Is Light Menstruation Normal?

I am 49 years old I saw the OBGYN last March and my Pap was normal, but my previous couple of months cycles were very light and only a couple of days. My whole life they have been very heavy and lasted 7days, so heavy I would have to take iron because I would get anemic. I Thought I was starting menapause. Since then I have only had 3 periods and the last one started 12 days ago and still hasent stopped. Is there something wrong or is this normal?