Black stool and fussiness 4 month old

Kevin

Is this normal? My LO is being fussy every time he wakes up from nap/sleep or before he sleeps and I didn’t poop for a week and then the 8th day he poop 3 times 2 with dark green stool and 1 with black stool. They are all wet and sticky like. Im worried can someone able to help me?