Not quite myself

Success with the formula milk... I slept right through last night!!
This morning Mummy took me to Little Ducklings again with Sarah and Archie. I wasn't as happy this time. I cried when I was dunked, and refused to splash on my tummy. I was quite happy just lay relaxing on my back though! Archie loved his swimming lesson.
When we got home I wasn't quite myself, and haven't been all day. I have fed and slept, and fed and slept (and sucked my thumb!) and fed some more. Mummy isn't really sure what's the matter, and is hoping I'm just having a bit of a growth spurt.