For the past few days, my 5 month old baby has not wanted to sleep. Usually she is asleep by no later than 10 pm but the past couple of nights she has fallen asleep at 1 am and wakes up at 9 am. She had one 20 minute nap today so far. She is acting super hyper but happy-- all smiles kicking her feet+hands up in air, laughing, and only gets upset and fusses if I try to put her down for some sleepy time. She has spit up more than usual but I think it is because she is constantly moving around. She is drooling too. Is this related to teething? I am happy she is so happy but concerned she is not getting enough rest.