4 months old baby boy no urine

hi mga momies, my bb BOY slept from 11pm to 6am after dede nya last nyt.. marami xang nadede na gatas.. nd his diaper was so clean wen he woke up.. no urine.. is it normal? and dis morning, umihi siya pero brown ang color nang urine nya, and 2nd tym nagchange kami nang diaper, may nakita akong spot, d ko sure if its a blood.. pro mejo brown yunG color padin (photo shown below)after nun, yellow na ang urine nya.. normal po ba yun? no fever c bb.. thanks for answering.. does the diaper can cause UTI?