Hi pb75
What did your blood tests results show - do you have them to hand (eg FSH, estradiol etc)? Have your periods shown signs of being irregular over the past few months and has cycle length increased or did you just suddenly start bleeding for a long time? At least you are in good hands. It sounds dramatic for the doc to say you are in the throes of menopause but in fact the peri-menopausal transition can last on average for several years from the first biggish variation in cycle length (although is not identical in all women) before the last period.
However at the moment you may only be at the start of peri-menopause (if your periods have been regular and fairly consistent in terms of length and flow etc) but important to monitor because if you are set to go through an early menopause (last period before age 45) then it is advised to take HRT to help protect heart and bones and general health - at least until the natural average age of menopause of 51. It may be too early for this though - if you are not yet getting menopausal symptoms (apart from bleeding).
Some women decide to have a Mirena coil at this point - to control bleeding (once any problems have been ruled out) and then when you start to get flushes etc, you can then add an oestrogen patch or gel at the dose that works for you.
Let us know how you get on with the ultrasound.
Hurdity x