D.C.
Hi G.~
Do you think it could be her 2 year molars coming in? My son was never a great sleeper (until recently) but I would notice more of a resistance to the bedtime routine when he was cutting a tooth.
Also, maybe since she is hitting the age of independence :-) give her some choices about bedtime. We try and let our son pick the book or pick the prayer. It seems like just the slightest thing will make him feel like HE is deciding to go to bed.
Lastly, I know you probably won't like this, I think it is time that you let her cry . . . now that doesn't mean leaving her on her own for hours crying . . . I would just let her cry and every night lengthen the time you go and tell her that she has to lie down. Like the first night go to her after 5 mintues, then 10, then 15 and so on. IT SUCKS! Believe me we did it with my son but it works.
It will get better . . . it's a just phases that they go through and put us through :-)
Take care.
D.