My 18 month old has recently started sleeping from around 7.15pm until 7am (sometimes 8) plus he can do a 2 hour nap in the afternoon, that's after a one hour (sometimes one and a half) np in the morning. So thats between 15 and 17 hours per 24 hours!! Is that too much. He has recently had bad cold and a course of antibiotics for a slight chest infection. He is otherwise well and plays well when he is awake. He is eating and drinking normally