Little one is 4. She has been dry day and night since 2 1/2 l. The last few weeks she has suddenly started having frequent bed wetting, I have been limiting drinks before bed ect but it doesn't seem to make any difference. She is also constantly asking for a drink through the day and has been really tired. She normally sleeps 12 hours per night but has also been having 2 hour naps during the day and is still really tired in the afternoons. Not sure what to think?