I see from your ticker that this started when your DD was about 4 months, that right...? Babies get up to all sorts of shenanigans at that age and feeding and sleeping habits often change. Is she very distracted? That often interferes with their feeding - they'd much rather be looking around - and then they need to eat more at night to catch up, which messes with their sleep routines.
Also, it's quite typical to only go 2-3 hours between feeds, so not a sign that anything's wrong or that she needs solids yet, I would think.
Hopefully things will settle down again soon.