I have a five month old baby girl who is very active throughout the day and is learning things very quickly. she is able to sit by herself and is teething since 4.5 months. she cries inconsolable at night and wakes up every 15 min crying. earlier she needed to be held in arms and then sleep then again wake up after 15 min. now she cries after every 15 min at night when she wakes up until I feed her. she takes at least 5 to 6 feedings at night and doesn't sleep before 3am. after that also wakes up after 15 to 30 min. please help