hello.. my baby is 6 weeks old.. since last night she won't sleep in her crib. for as long as i hold her she sleeps but wakes up as soon as i put her down. also when she wakes up she acts really hungry and cries with fingers in mouth but lets go of the breast after a few minutes. I don't know what to do.. I am really exhausted now.. could she have gas?? how can i get her to sleep peacefully??please advise..