sleeping problem ..again?

I am researching facts recently because I have no idea why vanessa's sleeping habit has gone from great to worst.She keeps waking up!my gosh wakes up at least 3 times a night which is driving me crazy.Babycenter said that it happens when they experience huge developmental spurt.With her case probably the walking because every time I go to her room when she "calls" me she is standing by the rail.Or could it be her teeth?or could it be night terror..I really don't know but I hope she'll go back to her schedule soon.I'm so tired...