Hi oldlass
I know you posted this a couple of weeks ago but was wondering about your situation.
Did the bleeding go on for a long time in the end? Hope you're feeling OK now.
You say withdrawal bleed so I presume you're on cyclical HRT? have you been continuing on cyclical HRT for all the time you mention - 102 days? ie several months without a bleed.
I don't know about your situation - age, where in menopause, but many women don't experience a withdrawal bleed on cyclical HRT and depends on their menopausal stage as well as the doses of both oestrogen and progesterone.
If you are taking the regulation doses and the right amount of progesterone and haven't had a bleed but suddenly are doing, then it could be that you are ovulating this month? Alternatively if you haven't been ovulating, and if insufficient progesterone, your womb lining could have built up and suddenly shed.
Either way if the bleeding is very heavy and you are worried because it is unusual for you, then do consider consulting your doctor to check all is well, though there is unlikely to be a serious cause for concern in your situation.
Hurdity x