Well I compromised and had her in bed at 7:15pm, asleep by 7:30pm. I still can't believe she took such a long nap- hopefully she's not getting sick!
I honestly think I needed to stretch her A time to 6 hours in order to get a nap of more than 1 hour. Once that was established (consistent naps of > 1 hour), I brought her A time back to 5.5 hours. Of course there was lots of experimenting along the way with A times, but that's what seems to work best for her.
Siria- my lo can sleep long nights, ~12 hours, but her naps have always been short. Is there anything going on with your lo, e.g. teeth, developmentally, etc.? When did the shorter naps start?