I am 53. I recently had a pap smear/pelvic exam and blood work done including checking my thyroid all during my annual physical. All results came back normal. My periods used to be very normal, ie. not too heavy, very regular, and lasting about a week. But, for the last 1 or two years, my periods have been extremely irregular in that they rarely occur and I barely bleed. My concern is, I've had a period for over 2 weeks now. Bleeding was a bit heavier, but nothing major. I had a headache for a couple days, but the bleeding seems to linger, very lightly. Should I simply assume it's from hormonal imbalance?