my baby is 4 month old. before 2 weeks she used to sleep in afternoon for 3-4 hours n also in night got up only once for feed. since 2 weeks or so she has not been sleeping at a stretch neither of the times. hardly half hour at best. n keeps rubbing ears n face. makes loud noises. isn't crying though. doesn't seem in pain either. wat could be the reason for her sleeplessness? wat should I do?