I'm constantly worried my 3 month old is not getting enough to eat or will get dehydrated. He normally has plenty of wet diapers, 5-6 a day, but last night he slept almost 8 hours and his diaper was barely wet. They've been very wet each time I've changed him since then. Also, I've read that when a baby cries but does not produce tears, that can mean they're dehydrated. My baby rarely produces tears. He never cries for long, but when he does he just gets puffy and red around the eyes. Should I be concerned?