Checking in. Thanks becca! 
Doctor last night said the allergy was almost certainly egg
and that I needn't go egg and dairy free
. Still hoping it wasn't egg though, there's a lot of pollen and cat hair around and he had been bitten by amosquito/ant just under his eye.
N is now looking at us, giggling and crawling away quickly. He also crawls in the opposite direction chortling to himself if you tell him to come here. Hope everyone is having a lovely morning, full of fun and giggles