It may not be a growth spurt but it could be developmental kwim? How old is she now? at certain ages they go through developmental stages that can interfere with their established habits. Sometimes you just have to persevere unfortunately, but you can also help to make life easier for all of you by just following their cues for hunger/sleep etc, even if it is outside the times they normally did things.

When you say 'up at 5pm', did you wake her or did she wake herself? If you woke her, then I would really be inclined to just let her sleep until she wakes up. But if she woke up herself, then maybe you could try to extend the time she is up for before putting her down. If she is showing tired signs (rubbing eyes etc) then put her straight back down again, even if it isnt' 'time' for her to go to bed, because sometimes once the go past that stage it is really hard to settle them.