At the risk of sounding patronising(not intended that way!)
Stay focused..... First 3 days are hellish,should get better,slightly,each day.If not,then maybe she's not quite ready.
Maybe better to stop and try again in another Month or so.
I have always had "False starts" with my three.
I have got so stressed with it all,as they weren't ready,(Oh the benefits of Hindsite )I turned into the Mum from Hell,doing all the wrong things like getting cross,making them sit for ages on a Potty etc etc.
So each time I abandoned postponed for a month or two,and each time they did it in 3 days the next attempt.
You have alot of stress at the moment,if she's not "improving" then postpone IME.
Better for her,and for you IMO.
Apologies if that sounds patronising or condescending in any way,just trying to give you some MN Virtual Valium Moral Support.