My 8week old son,in the last week, has started to sleep for most of the day and still sticks to his night routine of roughly 1am/4am/8am. He only seems to be a wake for a couple of hours in the morning while he gets bath etc.then he gets so tired that he is a sleep while i dress him.He only wakes for a feed.He has suffered bad reflux and colic since birth and in the last week has been put on ranitidine for his reflux.could this sleep be a side affect?hv said there is no side affects.im worried that he isnt getting enough stimulation to help him develop as he is always a sleep.