Angry Cat Sounds?

Margaux • Baby Matthew born on 12/3/15...new Mama alert!
Ladies: late night, kooky FTM post here. My son is in a gassy/fussy phase (hoping it's just a phase)-before he starts his screaming in earnest, he makes these sneezy/cough noises-just like a cat spitting in anger. It's sort of amusing (not the screaming part) but wondering if anyone else has a crabby cat. My 2AM anxiety then kicks in and makes me wonder if he is ok or just pissed!