She probably was shattered after yesterday Hon, but don't worry - she will get back to her routine. Probably short catnap in the morning could work but I guess it's too late now so just let her sleep on her nap for 2-2,5h and let's hope she will catch up.
So what's the best time for you to start the day? 730 would be an option? I guess that it won't be long until you have a choice - either cap the nap or offer shorter nights. So than you may go for a longer nap and shorter nights so you have a reasonable nap time.
But for now I would aim for the routine:
7:00/7:30 WU (right now she is closer to 5:30 and you get her up at 6am - yes? so we need a 1,5h push)
12:30-2:30 nap (as right now she goes till 11am, with WU push, you can have later nap)
8:00/8:30pm BT
To achieve it, I would push the nap but not by 2-3h as you did yesterday accidentally but let say 20-30min every 3-4 days (you have to judge if she needs more to adjust). When you are on above routine, you may try to push the nap later but till offer 8/8:30pm latest BT and maybe she will accept longer A in the morning and shorter in the evening.
Btw - I am NOT the toddler sleep expert for sure - but with 6:30WU, a nap around 2pm isn't late for a 2yo toddler? Maybe here there is an option for an earlier nap? This might be a totally stupid question, but worth asking:). There is also a board here I guess called "two under two" and for sure there are a lot of mummies with toddlers around so you may start a thread maybe on EASY board and ask how others deal with sleep of baby-toddler combo. I am sure someone can have some good advice!