The earliest memory I have, that I actually consider a memory and not just a weird dream, is a sensation of feeling very warm and comfortable and then suddenly feeling very cold and upset and wanting to go back to the warm place. I'd like to say this was a memory from when I was born, but I honestly have no clue when this happened as I couldn't see anything. I think the reason this memory stuck with me was just the stark contrast between "this is nice" to "this sucks, put me back".