Toddler keep wake up in the night

Hi mummies. My toddler is 20months now. He sleep at 10pm (after rolling here n there haha). After he slept he will wake up n cry. I try to pat him but can't he just keep crying. So I make a little milk for him. Then he ok. After few hrs. He wake up again. Crying. Pat also doesn't help. So I make a little milk again ( each feed he need cry 5-10mims then want to drink). Is it normal for a toddler wake up 2 times in the night at this age? Is tiring as I'm working the next day. Any tips ? Thanks