I have heard that being oversuppressed can cause sleeplessness and undersuppression can cause too much sleep. I do know how you feel as my 10 month old just recently started sleeping through the night. I would be talking to someone, lose my train of thought or couldn't think of the word I wanted to use....I would just say I'm still sleep deprived. I watched a show on sleep deprivation and those are very real side effects of not enoough sleep. We read a couple of books on sleep and how to gently train your child to sleep at night. But, first I would make sure her levels are in the normal range because it may not be her fault. We learned from the books that if she gets up at night we should not turn on lights or talk to her. It should be quick. We check for fever, change diaper (she hates to be changed at night so we did it to show her it's not all fun when you get up) and dad would get her not mom because she would want to nurse. He at first gave her diluted breast milk and slowly we changed it to water. Eventually she learned that getting up for water and a diaper change wasn't worth it. Once she started sleeping better at night many things improved. She would take better naps, very regular. She was not so cranky, she's very happy most days now. A schedule at bedtime is very important also. Get into a routine and do it everynight. Ours is a bath, nurse, dinner, books and songs and bed. Figure out what works and do it every night. It should be at the same time every night also. My daughter goes to sleep right away now. We will wean out baths every day but for now the sleep is sooooo good that I'm willing to do it. It soothes her aND relaxes her for bed. If you would like to know more you can email me. Good luck! Julia