My Daughter is 20 months old. she has slept in her bed unless she was sick since she was born and the past wee?

past week she hasnt wanted to sleep in her bed. she points to our room if i am rocking and cries. i rock her till shes asleep, she sleeps for a little while then wakes up crying or wining. if i go in her room she wont stop until i pick her up i tried singin sitting by her bed she only wants to go to our bed as soon as i put her in our bed she goes back to sleep. i think shes not sleeping good at night is why she is wining so much during the day. Daddy has to get up at 4:00 and i get up at 5:30 and i honestly dont know how long is to long, or not long enough to keep trying to get her to lay back down in her bed until i just pick her up and carry her to ours. i know shes trying to get away with it but i dont know what else to do. she doesnt take a cup to bed, she has a passy and a little bear thing she sleeps with and she always has the bear in hand and passy in her mouth when i go to check on her how do i get her to sleep through the night again.