At 22 months, your daughter is beginning to become more independent and is able to think past the immediate present. This is really an exciting time and a lot of fun. However, it also can lead to problems sleeping because when she wakes up in the middle of the night afraid or for whatever reason, she can lay around and think about the fact she's all alone in the room and doesn't like it. This is not so fun.
This stage will pass which is why you don't see many posts from mothers trying to ask for help with their gradeschool kid who won't sleep through the night.
My kids went through this and here are some of the things I did:
I use the fisher price aquarium toy which has music and light. In fact, my 5 year old still likes to turn it on when he's going to sleep and will hit it on if he wakes up in the middle of the night.
I have a fan going in the room to produce white noise. This is helpful to muffle out background sounds that may wake your daughter up and make her wonder what the noise is.
Encourage the use of a favorite stuffed animal or toy to bring to bed. She may be soozed by its presence enough to go back to sleep without needing you.
Stop taking her out of the room to go back to sleep. I took to sleeping on the floor next to my son's bed. Yes, it wasn't the most comfortable, but I could quickly soothe him back to sleep.
Whatever you do, and I know its not easy, don't get angry or scold your daughter. You want sleep time to be a positive experience, not a battle. Think of all the times you wake briefly through the night. Ultimately, she will also be able to put herself back to sleep on her own. It may not be instantly, but it will happen.
Both of my kids sleep through the night consistently at ages 3 and 5. I only have to get up with them if one of them is sick or has a nightmare. Though I will admit that there were some nights that I thought I was never going to sleep again.
Good Luck. Hang in there. It will get better.