Help! My 3 1/2 year old slept great and didn't wake in night. However for last few months he has started waking 3 or 4 times in night. Sometimes says he needs wee, sometimes too hot too cold, needs drink! Have tried using clock with night light, making sure he uses toilet before bed & not too much milk, even has new bed now as we had spare one with good mattress. Can't think what else to try. Is it a developmental phase that will pass or is sleep training needed? Any ideas or if anyone has similar please advise!! Thanks!