Hello Becr, like Hurdity I stopped HRT (having been on full strength systemic for just under six years) and for the first three months I thought wow wonderful no symptoms whatsoever, I feel great, should have done this years ago. Uh oh, spoke too soon, after five months the main symptom that pushed me to take HRT in the first place was back, and with a vengeance, along with assorted other symptoms that were gradually rearing their ugly heads again.
The point being that as it takes time to build up estrogen levels in your body, so too does it take time for them to gradually leach out (a bit like peri I suppose, bit by bit, drop by drop...)
As Hurdity suggests (she sounds very wise and knowledgable) give it a go and see what happens, but I'd suggest that you be prepared with as big an arsenal as you can muster to combat whatever symptoms might resurface.
Best of luck to you
LL