Hmm.... I would try cutting out 1 nap. My daughter went down to just 1 nap around the 1 year mark. She may just be sleeping too much during the day. Set a new routine of napping after lunch or something. Keep her nice and active in the morning. The first few days will be a little rough. Baby will be tired. But, keep at it.
It could also be new emergent skills. Is she walking? Is she trying to run? They get excited about new skills and want to try them out ALL the time.
The other thing.. could be growth spurt. When my daughter was 11 months old we went through an entire month of HORRIBLE sleep. She literally was up every 2 hours and sometimes she would just want to be up at 3 in the morning! I was BEAT. Then, I took her for her 1 year check up ... she GREW 1.5 inches in 6 weeks!!!!!
My OB told me there was a study done to see how kids grow. Incrementally or all at once. They found that kids can literally grow overnight by up to 1/4 inch. So, that kind of growth can't be comfortable.
I would start with cutting out 1 nap and go from there.