If you suspect that he's got a sore throat still/again..I'd take him to your GP for a check... Oskar has had a few throat infections and apparently his throat has been red raw .... he's had to go on antibiotics to help clear it. Also, if it is something like that, when they're so little it can quite quickly develop into other things. So, I would be taking a trip to doc's to check that as it can really disrupt their sleep. Oskar was waking ALL night when he had this. I hope that he settles back down for you again.