hi. i've just been checking back to a thread i started in 2006 - oldest lady still menstruating - and there were a few ladies of 55/56, one of 58 and yet another of 63!!!! for myself, i was 53 and a half when i had my last period and my gp reckoned i was 'old' to still be getting them then.
so whilst you're on the older side of normal, you're definately not the oldest - YET!
you may find that they just stop rather than tailing off, or they may start to get fewer, there's no real way to tell. or you may just carry on and become the oldest lady EVER to have periods, and as one lady put it, have to buy tampons with your pension!