FTM help😔☹️

So obviously I'm a FTM, I just had my son a week ago. At night lately in between his sleeping time before his next feeding he'll be pretty fussy. He eats every 3 hours, so it's for at least 2 hours he'll be fussy. I try everything, burping, checking if he needs to be changed or changing him, rocking him, swaddling him, playing music, holding him, last resort I'll give him a pacifier. He'll still be fussy, after he gets fed and changed again he'll be fine the rest of the night. But last night was absolutely horrible. He woke up about 8:40, he eats at 9. So I fed him a few minutes earlier. He went to sleep for a little bit, but then he was fussy the rest of the night. I mean to where he was just screaming. I tried everything I listed and nothing would clam him down. I had to change his diaper a few times because he peed pooped once but he still was not happy. Even after he was fed again at 12. I ended up having to take him down stairs and tried putting him in his swing even though I tried rocking him in his bassinet and it didn't work. But he still was screaming and crying. He finally fell asleep around 2:30 but had to get up at 3 to eat again, and since he's been out like a light(I still got him up at 6 and he was pretty sleepy). And he pees and poop the exact amount + ,he's suppose to for a newborn. I feel horrible because I have no idea what is wrong with him and that he was up like literally all night. He fell asleep a few times in between all of that but it'd be for maybe a half hour. Like his own mom doesn't know what's wrong with him and how to help him. How do I figure out what was wrong with him, when I tried everything. What if he does this again tonight? What do I do😔