i started drinking my morning coffee again 4 days ago. i only drink 1-2 cups in the morning. the first 2 days she was fine but yesterday she was up all night and she's been up all day today. she's 4 weeks old. she keeps acting like her stomach hurts and she's really fussy even when she's in her sling and she normally loves her sling. she's been spitting up every time she eats and her poop changed from the mustardy yellow color to a darker brown. she has her checkup tomorrow and of course im not going to drink anymore coffee. is this a normal reaction to caffiene or is it something else?