HI, my daughter is lovely. For the first hour after a sleep (she has 2 1 hour daytime naps and goes through the night) that is. The second hour is slightly hard work and the third hour she's often irritable if not screaming her head off. It's like her brain gets overloaded very quickly. Even if we're doing relatively quiet things. Is this normal do you think? My friends babies seem to be able to handle much longer periods of wakefulness.