Baby not sleeping well

Hello Ladies so i have write many times here for my baby about his sleep.Before 1 month or so my baby wouldnt sleep all night long and stay awake 8-9 straight hours.He now is 5 months old.Now he is sleeping on 9:00 PM all the night but the problem is that he is not sleeping well.He just moves, sheugs the stomach and does voices and if i do

not rock him he not continue sleeping.I think that is stomach pain but i am unsure.Every night from 9:00 PM - 2-3:00 he will wake

up every 20-30 mins.From 3: 00 am he is ok heavy sleep and wakes up 2 or 3 times till 9:00 am.Any suggest please ? Thank youu