Hi, my 10.5month old little girl usually wakes in the morning with a nappy so full it's exploding. She feeds constantly through the night (whole other problem). Last night was no different with feeding except when she woke for the day this morning she had barely urinated. Today she has breastfed normally and she hasn't wet as much as normal. Her intake is normal but output reduced. She is otherwise her version of normal, any ideas? Reason for concern?