Hi, me again.. So sorry to bother you yet again

Things have been going really well for a week using the A times you gave me before. However, it seems this little monster has a habit of regressing back to a 45-minute nap after a week!
This morning we even had a EW of 5.40am but was content to play for over half an hour before I went to get her.
For the last 3 days we're back to 2x 45mins naps and an EBT of 6.15-6.30pm. I've been trying to keep the A times consistent like before so that's what time BT works out at. But now I'm thinking she's starting to get OT again given the EW this morning.
Even after waking at 5.40am, she made it to 10.30am for her first nap... She was sooo tired I felt she'd have a longer nap for sure, but to no avail. Dosed her up for the last two mornings thinking it might be teething, but that hasn't helped again.
Do you think I should go back to w2s and up the A times for the am one again? Also, what time would you do BT tonight? She seems to have gotten into the habit of having 11hrs regardless of naps
Xx