Hello, my nearly 3 week old is only having bowel movements every 3-4 days. Its loose and yellowy when he does go, just worried he should be more regular? He's formula fed and feeds well! We do lots of bicycle legs, tummy massage etc to try and help things along. He can have huge meltdowns in the evening appears to be uncomfortable but could that be wind/ colic/ witching hour? Any advice? When should I seek gp / medical advice? First time mumma here. Tia x