That just sounds like a new baby adjusting to the world haha, you'll know if he's colicky. My son slept 1 hour at a time, sometimes 2-3 IN our arms, until he was 6m. Never accepted a pacifer so I was his human pacifer, and we he did finally accept a bottle at 6m, he went straight on formula and everything seemed alot better. Don't jinx yourself just yet! You'll know when it's colic. Try gripe water when he's a month, or whatever the bottle says, and swaddling. Keeping him on your chest should help too, a lot of time they don't even eat, just comfort nurse. I found the only way to silence my son was to keep a boob in the mouth, saved my sanity
At 3days old? Sounds like an average baby. My baby started around 8 weeks would cry from 7pm every night until 11pm. Nothing would soothe her it was miserable.