Aw, one month na agad, time flies talaga! Honestly, kung sobrang irritable siya gabi, usually it's either hunger, gas, or just the witching hour, a few of us moms swear by doing a warm bath before bedtime or gentle tummy massage to help with gas, and making sure siya is fed well before sleep para hindi agad gutom ulit. Try din yung white noise or soft humming, parang calming siya talaga; one of my mum friends shares a tip na minsan kailangan nila ng more frequent feeds at gabi kasi gusto nila mag-cluster feed especially around that 3-6 week mark. Since siya almost one month na, best to double-check with your pedia if the irritability is constant or may fever, para sure lang na okay lang siya! Hang in there, mama, gabi phases ito usually, and it does get better.