Advice on not sure if 5 month baby is getting enough milk whislt feeding?

i leak alot less then when i first had my son so knew then that had a lot of milk, now i feel have most milk in the morning and soemtimes think the milk baby is getting isnt enough for him - i really wnat to carry on giving him milk for as long as i can. i have started giving him pure baby rice once in the evening only.