Acid reflux or Colic

Shai-Anne

My 3 week old has been really fussy here lately. I'm breastfeeding and also using formula as I don't produce enough milk.

His stomach is real hard and he just doesn't sooth.

I just assume it's colic but I'm curious what does acid reflux look like in a newborn? I always here people saying their LO has it but it's never been brought up by the dr Sonim not sure what the symptoms would be