Hey, im sure whoever knows more than i do will ask for your EASY routine so you can post that, its easier to give advice then:-)
I am wondering if you are on EASY? Have you used shh/pat method?
The baby shouldnt be sleeping in your arms, you can calm him down in your arms with the shh/pat method but he should fall asleep in his crib. Once you re on a routine and sleep training most of this issues will go away:-) They did with my LO, we started EASY around his 4th week and sleep training around his 6th week.