My LO is 11 days old. He has been cluster feeding the past week but as of yesterday been spitting up a lot and squirming in discomfort. I tried burping but he wouldn't. He barely slept yesterday too. He's acting a little better today but still nursing a lot and spitting up what seems to be a lot of what he's taking in. No fever. He's had a slight decline in wet diapers from 10 to about 6 or 7. Am I just being paranoid?