Hmmmm I'm not sure. If she hadn't already dropped the nap, I'd say those 3 days looked like a pretty typical 1-0 transition.
I still wonder if molars could be contributing. I have a friend IRL who has a little boy who doesn't seem bothered by teething g but does wake early when they are coming in. Sleep can be quite light in the early morning so could be disrupted by discomfort.
If that's it, then you might just need to ride it out, let her nap in day to catch up if she needs to but stuck with a set BT.
On other hand, EW can also be a sign of OT. How long after dropping her nap did the EW start?