Baby 20 Months Old Not Sleeping Through Night She Is

baby 20 months old not sleeping through night she is getting up 2 to 3 times even though I give her full meal and when she wakes up in middle I will give 1 tumbler of full fat milk in feeding bottle.but still she is not sleeping through night.am following routine as well.but she is not sleeping through night.morning 12.30 to 2 p.m she takes a nap and from 2 till 8 she plays and I bath her by 8.30 and by 9.15 I finish her dinner and by 9.30 I switch off lights by 10 to 10.30 she sleeps off but by 12.30 to 1.30 she wakes up I give her milk.some times she is sleeping sometimes she is not sleeping.just sitting and looking at night lamp.crying to go to her grand mom it takes morning 4.30 to 5 to make her sleep again and also she is not going to deep sleep if she hears any slight sound also she is waking up.i stopped breastfeeding last month that is her 18 th month to 19th month still she is not sleeping through the night